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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def show_help(self):
 """Show usage info to the user. .. versionadded: 4.3.0 """

        # Read the header and footer html snippets
        self.main_stacked_widget.setCurrentIndex(0)
        header = html_header()
        footer = html_footer()

        string = header

        message = impact_report_help()

        string += message.to_html()
        string += footer

        self.help_web_view.setHtml(string)