I am going to build all my kitchen cabinets and I have some questions

1. What's the best material to use for kitchen cabinets drawer sides, back
and bottom? Maple, Burch, something else?

2. I assume the most practical way to build cabinets cases sides , bottom
and back from plywood. What type and thickness of plywood is the best for
this?

3. Is it best to build kitchen cabinet shelves from solid wood or plywood?

The cabinets drawer faces, doors and face frame will be built from cherry.