I need to extend the Visa EEA Family for my husband here in UK LOndon.

How do i have to do that????
Where do i have to do that? And what do i need for it???
My Husband is a canadian national and im a eu national!
He is still in Canada.
Is he allow to work with EEA Family Visa too?
Which Visa does he needs to work in UK???

PPLLEEAAASSEEEE Help me guyzzzzz......
need to know it as soon as possible......

Thanks....