I am extremely interested in the project " offline mode for stack " for GSoC, for which I have learnt basic stack and have been learning more. 

Please guide me as to what other specific things I have to delve into and how to  break this problem into pieces to form my proposal. 

I can't seem to get in touch with the projects mentor Emanuel Borsboom.

And as the deadline is reaching, I really need to start forming my proposal now. 

Soliciting a prompt and positive response.