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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 _add_mermaid_js(self):
 """add js libraries and css files of mermaid js_file"""

        self.add_javascripts('{}/js/jquery-1.11.3.min.js'.format(self.resources_path))
        self.add_javascripts('{}/js/mermaid.min.js'.format(self.resources_path))
        self.add_stylesheets('{}/css/mermaid.css'.format(self.resources_path))
        self.main_soup.script.append('mermaid.initialize({startOnLoad:true  });')