Multiple figures span to one column on IEEE 2 column format

Question

I am just following this figure span to one column on double column page to span figures on a two-column page but the difference instead of pasting one figure I need to put two and three figures here.

This is code for pasting a figure by spanning two columns

\documentclass[twocolumn]{article}
\usepackage{lipsum}% http://ctan.org/pkg/lipsum
\usepackage[demo]{graphicx}% http://ctan.org/pkg/graphicx
\begin{document}
\section{First section}
\lipsum[1-2]
\section{Second section}
\lipsum[3]
\begin{figure*}
  \includegraphics[width=\textwidth]{figure}
  \caption{This is a figure caption}
\end{figure*}
\lipsum[4]
\section{Last section}
\lipsum[5-10]
\end{document}

I want to this same but instead of one figure I want to put two and three figures. I tried this but it's not working. Can any one help?

 \begin{figure*}
  \includegraphics[width=\textwidth]{1.PNG}
  \caption{This is a figure caption}
  \includegraphics[width=\textwidth]{2.PNG}
  \caption{This is a figure caption}
\end{figure*}

see figure for clear requirements.

please try to help instead of passing comments that it's already been answered. The existing one didn't help me that's why I posted this.

Answer 1

I propose this solution, based on the floatrow package:

\documentclass[twocolumn]{article}
\usepackage{lipsum}
\usepackage{graphicx}
\usepackage{floatrow}
\DeclareFloatSeparators{Qquad}{\hskip4em}

\begin{document}

\section{First section}
\lipsum[1-2]

\section{Second section}
\lipsum[3]
\begin{figure*}

\floatsetup{floatrowsep=Qquad}
\begin{floatrow}
  \ffigbox[\FBwidth]{\caption{Ralph Steadman. Illustrations for \emph{Alice in Wonderland}}\label{Alice-Ralph}}{\includegraphics[scale=0.4]{AliceSteadman}}
\ffigbox[\FBwidth]{\caption{Yuri Norstein. \emph{Hedgehog in the fog}}\label{Hedgehog}}{\includegraphics[scale=0.5]{Hedgehog-in-the-fog}}\hskip4em
\ffigbox[\FBwidth]{\caption{Max Ernst. \emph{Euclid}}\label{Ernst}}{\includegraphics{Euclid}}
\end{floatrow}
\end{figure*}
\lipsum[4]

\section{Last section}
\lipsum[5-10]

\end{document}