\documentclass[12pt]{article}
\usepackage{amsmath, amssymb, graphicx, array, fancyhdr, unicode-math, multirow}
\DeclareMathOperator{\Var}{Var}
\DeclareMathOperator{\sd}{SD}
\DeclareMathOperator{\Pois}{Pois}
\DeclareMathOperator{\Bin}{Bin}
\DeclareMathOperator{\NegBin}{NegBin}
\DeclareMathOperator{\sech}{sech}
% Text: Calibri, all bold
\setmainfont{Calibri}
\renewcommand{\seriesdefault}{b}

% Math: choose a math font and visually embolden it
\setmathfont{TeX Gyre Termes Math}                  % base math font
\setmathfont[FakeBold=1.9]{TeX Gyre Termes Math}    % embolden; adjust 1.6–2.4

% header
\pagestyle{fancy}
\fancyhf{}
\lhead{\resizebox{!}{2cm}{C}}
\chead{\raisebox{0.5cm}{\Huge Introduction}} % (add title text if you want)
\rhead{\resizebox{!}{2cm}{C}}
\setlength{\headheight}{2.5cm}
\setlength{\headsep}{12pt} % space between header and body

\begin{document}
\thispagestyle{fancy}


\begin{table}[h!]
\centering
\renewcommand{\arraystretch}{1.2}


\begin{tabular}{>{\centering\arraybackslash}m{1.2in} >{\centering\arraybackslash}m{4in}}
\fbox{\includegraphics[width=1in]{images/single.png}} &
\includegraphics[width=2in]{images/three_coin.png}
\end{tabular}


\begin{tabular}{>{\centering\arraybackslash}m{1.2in}
                >{\centering\arraybackslash}m{2in}
                >{\centering\arraybackslash}m{2in}}
\fbox{\includegraphics[width=1in]{images/abstract.png}} &
$A \subseteq B \Rightarrow\;
\mathrel{\raisebox{-0.2\height}{\includegraphics[width=0.25in]{images/thumb_up.png}}}$ &
$B \subseteq A \Rightarrow\;
\mathrel{\raisebox{-0.2\height}{\includegraphics[width=0.25in]{images/thumb_down.png}}}$ \\
\\
\\
\end{tabular}



\begin{tabular}{>{\centering\arraybackslash}m{1.2in} >{\centering\arraybackslash}m{4in}}
\fbox{\includegraphics[width=1in]{images/question.png}} &
\includegraphics[width=4in]{images/coin_sample.png}
\end{tabular}


\begin{tabular}{>{\centering\arraybackslash}m{1.2in}
                >{\centering\arraybackslash}m{2in}
                >{\centering\arraybackslash}m{2in}}
&
$F \subseteq E \Rightarrow\;
\mathrel{\raisebox{-0.2\height}{\includegraphics[width=0.25in]{images/question.png}}}$ &
$E \subseteq F \Rightarrow\;
\mathrel{\raisebox{-0.2\height}{\includegraphics[width=0.25in]{images/question.png}}}$ \\
\end{tabular}



\end{table}

% second page
\newpage
\thispagestyle{fancy}


\begin{table}[h!]
\centering
\renewcommand{\arraystretch}{1.2}


\begin{tabular}{>{\centering\arraybackslash}m{1.2in} >{\centering\arraybackslash}m{4in}}
\fbox{\includegraphics[width=1in]{images/key.png}} &
\includegraphics[width=4in]{images/coin_sample.png}
\end{tabular}

\begin{tabular}{>{\centering\arraybackslash}m{1.2in}
                >{\centering\arraybackslash}m{2in}
                >{\centering\arraybackslash}m{2in}}
&
$F \subseteq E \Rightarrow\;
\mathrel{\raisebox{-0.2\height}{\includegraphics[width=0.25in]{images/thumb_up.png}}}$ &
$E \subseteq F \Rightarrow\;
\mathrel{\raisebox{-0.2\height}{\includegraphics[width=0.25in]{images/thumb_down.png}}}$ \\
\end{tabular}

\end{table}

\end{document}
