JSP org.apache.tomcat cannot be resolved for type

I'm new to Tomcat Project, to start the setup I duplicated a set of projects from a friend of mine. When I started the project index.jsp.java in Tomcat working folder some error appears on

  private org.apache.tomcat.InstanceManager _jsp_instancemanager;

  public java.util.Map<java.lang.String,java.lang.Long> getDependants() {
    return _jspx_dependants;
  }

  public void _jspInit() {
    _el_expressionfactory = _jspxFactory.getJspApplicationContext(getServletConfig().getServletContext()).getExpressionFactory();
    _jsp_instancemanager = org.apache.jasper.runtime.InstanceManagerFactory.getInstanceManager(getServletConfig());
  }

      

        
        
        
      

    

eclipse show "org.apache.tomcat cannot be resolved for type" and "InstanceManager cannot be resolved for type"

Any help on this issue?