[Cadet]

Player A1 takes a layup / goes airborne.
Player B1 has a legal guarding position.
Player B2 does not / steps in the path of A1.
A1, while remaining airborne, hits B1 and then B2.
What's the call?

Charge on A1?
Double foul - Charge on A1 and block on B2?

Does the call differ if the order of contact were changed -
A1 hits both simultaneously?
A1 hits B2 first?