VBA to Expand/Collapse Row Groupings

Hello,

I'm very new to VBA but am trying to learn this one step at a time!

Can you please help me figure out how to group/ungroup rows based on a value chosen from the Combo Box?

Attached is the report sample for your reference.

Basically I want to expand the entire group where the week chosen falls under. If a user choose Week 3 then i want rows 7:10 to be expanded only.

Thanks in advance!