Cannot find the requested page

wamp and composer is installed
slim is on project dir installed.

Not Found

The requested URL /myapp/index.php/Hello/p was not found on this server.

Apache/2.4.18 (Win64) PHP/5.6.19 Server at localhost Port 80

now my question is that what step I am missing.

In what folder did you put Slim? Message seems to be from Apache not being able to find Slim

wamp:www>myapp(myapp is the dir where slim is installed)
wamp is running successfully, without no issue.
followed this tutorial: