\begin
Discover why 18 million people worldwide trust Overleaf with their work.
\documentclass[12pt,oneside]{book}
\usepackage[letterpaper, left=1.2in, right=1in, top=1in, bottom=1in]{geometry}
\usepackage{fancyhdr}
%\pagestyle{fancy} % add Heading of Chapter on top of each page
\pagestyle{plain}
\fancyhf{}
\rhead{\thepage}
\lhead{\leftmark}
\renewcommand{\chaptermark}[1]{\markboth{\MakeUppercase{#1}}{}}
% \pagestyle{headings}
\usepackage{titlesec}
\usepackage{titletoc}
\usepackage{lipsum}
% \usepackage{fmtcount} % for textual representation of numbers
\titleformat{\chapter}[display]
{\normalfont\huge\bfseries}{\chaptertitlename\thechapter}{30pt}{\Huge}
\usepackage{enumitem}
\usepackage{makecell}
\usepackage{float}
\usepackage{amsmath,amssymb,amsthm,amsfonts}
\usepackage{soul}
\usepackage{frcursive}
\usepackage{algorithmic}
\usepackage{graphicx}
\usepackage{booktabs, multirow} % for borders and merged ranges
\usepackage{tocloft}
\renewcommand{\cftchapfont}{\bfseries}
\renewcommand{\cftchappagefont}{\bfseries}
\renewcommand{\cftchappresnum}{Chapter }
\renewcommand{\cftchapaftersnum}{:}
\renewcommand\cftchapafterpnum{\vskip 1pt}
\renewcommand{\cftchapnumwidth}{1em}
\renewcommand*\cftfigpresnum{Figure~}
\settowidth{\cftfignumwidth}{\cftfigpresnum}
\renewcommand{\cftfigaftersnumb}{\quad~}
\renewcommand*{\cfttabpresnum}{Table~}
\settowidth{\cfttabnumwidth}{\cfttabpresnum}
\renewcommand{\cfttabaftersnumb}{\quad~}
\usepackage[nottoc,notlof,notlot]{tocbibind}
\usepackage{soul}% for underlines
\usepackage[table]{xcolor} % for cell colors
% \usepackage{} % Change to other font if needed
\usepackage{setspace}
% \usepackage{textcomp}
\usepackage{xcolor}
\usepackage[bookmarks=true, hidelinks]{hyperref}
\usepackage[backend=bibtex,style=ieee,sorting=none]{biblatex} % ieee citaion style
%\usepackage[backend=biber,style=apa]{biblatex} % apa citation style
\usepackage[utf8]{inputenc}
\usepackage{appendix}
\usepackage{listings}
\usepackage{bm}
% \usepackage{natbib}
\setcounter{tocdepth}{2}
\setcounter{secnumdepth}{5}
\bibliography{Reference}
\usepackage{titlesec}
\titlespacing*{\chapter}{0pt}{-30pt}{30pt}
\titleformat{\chapter}[display]{\normalfont\huge\bfseries\centering}{\centering\chaptertitlename\ \thechapter}{20pt}{\Huge}
\begin{document}
\doublespacing
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Additional Material
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Title Page
%========================================
\input{Additional/TitlePage.tex}
\currentpdfbookmark{Title Page}{TitlePage}
\pagenumbering{roman}
\setcounter{page}{2}
% Dissertation Approval Form
%=========================================
% \input{Additional/ApprovalForm}
% \clearpage
% Acknowledgements
%=========================================
% \input{Additional/Acknowledgements}
% \clearpage
% Abstract
%=========================================
\input{Additional/Abstract.tex}
\clearpage
% Declaration
%=========================================
% \input{Additional/Declaration.tex}
% \clearpage
% \begin{singlespace}
% \setlength\cftbeforefigskip{\baselineskip}
% \Abstract
% \end{singlespace}
% \setcounter{page}{3}
% Acknowledgements Page (optional)
%========================================
%\pagenumbering{roman} % Uncomment if Copyright page is not in use
% \addcontentsline{toc}{chapter}{Acknowledgments}
% %\setcounter{page}{2} % Uncomment if Copyright page is not in use
% \input{Additional/Acknowledgements.tex}
% Table of Contents
%========================================
%\pagenumbering{roman} % Uncomment if Copyright and Acknowledgements are not in use
%\setcounter{page}{2} % Uncomment if Copyright and Acknowledgements are not in use
% \renewcommand{\cftchapdotsep}{\cftdotsep}
\renewcommand{\contentsname}{\hfill \Large \uppercase{Table of Contents}\hfill}
\renewcommand{\cftaftertoctitle}{\hfill}
\addcontentsline{toc}{chapter}{Table of Contents}
% \begin{doublespacing}
\tableofcontents
\clearpage
% \end{doublespacing}
% \currentpdfbookmark{Table of Contents}{TOC}
% List of figures and tables
%========================================
% \addcontentsline{toc}{chapter}{List of Tables}
\renewcommand{\listtablename}{\hfill \Large \uppercase{List of Tables} \hfill}
\addcontentsline{toc}{chapter}{List of Tables}
% \begin{singlespace}
% \setlength\cftbeforetabskip{\baselineskip}
\listoftables
% \end{singlespace}
\clearpage
% \addcontentsline{toc}{chapter}{List of Figures}
\renewcommand{\listfigurename}{\hfill \Large \uppercase{List of Figures} \hfill}
\addcontentsline{toc}{chapter}{List of Figures}
% \begin{siwnglespace}
% \setlength\cftbeforefigskip{\baselineskip}
\listoffigures
% \end{singwlespace}
\clearpage
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Main Content
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% resume page numbering for rest of document
\pagenumbering{arabic}
\setcounter{page}{1} % set the page number appropriately
% Chapter 1
\input{MainContent/Chapter1.tex}
% Chapter 2
\input{MainContent/Chapter2.tex}
% Chapter 3
\input{MainContent/Chapter3.tex}
% Chapter 4
\input{MainContent/Chapter4.tex}
% Chapter 5
\input{MainContent/Chapter5.tex}
% Chapter 6
\input{MainContent/Chapter6.tex}
% Chapter 7
\input{MainContent/Chapter7.tex}
\clearpage
% Reference
%========================================
\addcontentsline{toc}{chapter}{References}
\begin{singlespace}
\setlength\bibitemsep{\baselineskip}
\printbibliography[title={References}]
\end{singlespace}
\clearpage
% Appendices
% \input{MainContent/AppendixA.tex}
% \clearpage
% \input{MainContent/AppendixB.tex}
% \clearpage
\end{document}