Help with survey data!

Hi,

I am stuck between calculating data through pivot tables for a survey done by me. Can someone please help me with it? While using the pivot I want to check values of 2 questions simultaneously - like what is age of your children and under that I want to check as per age group what the weekly usage of tablets/smart devices by these children.

Can you please help in putting up the correct settings to get these insights?

Thanks!