ArtMetal

Hello!
Blacksmith and sheetmetal worker here! several questions:
First off, I am wondering whether it is possible to raise sheets of mokume gane/pattern laminated metals in general. Should it be done hot?

Second, Is it possible to laminate steel/iron sheet and copper, or steel/iron and nickel? If so, when annealing should I quench for the copper or air cool for the ferrous metal, I'd use iron or mild steel.

Third and finally, would it be possible to do a fagot weld of brass and copper or would the zinc just burn out of the brass?
Thanks eversomuchmoreso,
sorry to ask so many questions!
Archie