如何将扫描的图像放置在正确的位置

Question

在我的乳胶中，我无法将扫描的图像放置在正确的位置，例如在每个段落之后我必须给出正确的页面，这是我所做的：

     \section{conclusions}
     \subsection{Appendix-A}


     \begin{figure}
     \centering
     \begin{subfigure}[b]{\textwidth}
      \centering
      \includegraphics[width=\textwidth]{IMG_20190710_122916.jpg}
      %\caption{$y=x$}
       %\label{fig:y equals x}
     \end{subfigure}

      %\caption{Three simple graphs}
       %\label{fig:three graphs}
       \end{figure}
       \begin{figure}
      \begin{subfigure}[b]{\textwidth}
      \centering
      \includegraphics[width=\textwidth]{IMG_20190710_150926.jpg}
      %\caption{$y=3sinx$}
      %\label{fig:three sin x}
      \end{subfigure}

      %\caption{Three simple graphs}
       %\label{fig:three graphs}
      \end{figure}
      \begin{figure}
       \centering
       \begin{subfigure}[b]{\textwidth}
    \centering
    \includegraphics[width=\textwidth]{IMG_20190710_151003.jpg}
    %\caption{$y=x$}
    %\label{fig:y equals x}
    \end{subfigure}


   %\caption{Three simple graphs}
   %\label{fig:three graphs}
  \end{figure}
   \begin{figure}
  \centering
  \begin{subfigure}[b]{\textwidth}
    \centering
    \includegraphics[width=\textwidth]{IMG_20190710_151038.jpg}
    %\caption{$y=x$}
    %\label{fig:y equals x}
\end{subfigure}


%\caption{Three simple graphs}
%\label{fig:three graphs}
 \end{figure}
  \begin{figure}
\centering
\begin{subfigure}[b]{\textwidth}
    \centering
    \includegraphics[width=\textwidth]{IMG_20190710_151114.jpg}
    %\caption{$y=x$}
    %\label{fig:y equals x}
\end{subfigure}


%\caption{Three simple graphs}
%\label{fig:three graphs}
\end{figure}
\begin{figure}
\centering
\begin{subfigure}[b]{\textwidth}
    \centering
    \includegraphics[width=\textwidth]{IMG_20190710_151147.jpg}
    %\caption{$y=x$}
    %\label{fig:y equals x}
\end{subfigure}


%\caption{Three simple graphs}
%\label{fig:three graphs}
 \end{figure}
\subsection{Appendix-B}
\paragraph{B.1 Feynman rules for Majorana Spinors:}
\begin{figure}
    \centering
    \begin{subfigure}[b]{\textwidth}
        \centering
        \includegraphics[width=\textwidth]{IMG_20190710_112008.jpg}
        %\caption{$y=x$}
        %\label{fig:y equals x}
    \end{subfigure}

    %\caption{Three simple graphs}
    %\label{fig:three graphs}
     \end{figure}
      \paragraph{B.2 Tree Level contribution to $N_k\rightarrow       l\overline{\phi}$ :}
      \begin{figure}
      \centering
       \begin{subfigure}[b]{\textwidth}
        \centering
        \includegraphics[width=\textwidth]{IMG_20190710_112113.jpg}
        %\caption{$y=x$}
        %\label{fig:y equals x}
        \end{subfigure}
        \end{figure}
    \begin{figure}
    \begin{subfigure}[b]{\textwidth}
        \centering
        \includegraphics[width=\textwidth]{IMG_20190710_112224.jpg}
        %\caption{$y=3sinx$}
        %\label{fig:three sin x}
       \end{subfigure}
       \end{figure}
       \subsection{Appendix-C}
       \paragraph{C.1 Vertex contribution to the CP asymmetry:}
        \begin{figure}
    \centering
    \begin{subfigure}[b]{\textwidth}
        \centering
        \includegraphics[width=\textwidth]{IMG_20190710_211454.jpg}
        %\caption{$y=x$}
        %\label{fig:y equals x}
    \end{subfigure}
    \end{figure}
     \begin{figure}
     \centering
    \begin{subfigure}[b]{\textwidth}
    \centering
    \includegraphics[width=\textwidth]{IMG_20190710_211554.jpg}
    %\caption{$y=x$}
    %\label{fig:y equals x}
    \end{subfigure}
    \end{figure}
    \begin{figure}
     \centering
    \begin{subfigure}[b]{\textwidth}
    \centering
    \includegraphics[width=\textwidth]{IMG_20190710_211635.jpg}
    %\caption{$y=x$}
    %\label{fig:y equals x}
    \end{subfigure}
    \end{figure}
    \paragraph{C.2 Self energy contribution to the CP asymmetry:}
     \begin{figure}
    \centering
    \begin{subfigure}[b]{\textwidth}
        \centering
        \includegraphics[width=\textwidth]{IMG_20190710_112406.jpg}
        %\caption{$y=x$}
        %\label{fig:y equals x}
    \end{subfigure}
     \end{figure}
     \begin{figure}
      \centering
     \begin{subfigure}[b]{\textwidth}
    \centering
    \includegraphics[width=\textwidth]{IMG_20190710_112651.jpg}
    %\caption{$y=x$}
    %\label{fig:y equals x}
    \end{subfigure}
     \end{figure}