5.19 - Relative strength of electric and magnetic forces
5.22 - find A for a finite segment of straight wire carrying current I.
5.23 - Find J given a particular A
5.26 - Find A for a plane surface current
5.29 - Find B from A inside a uniformly charged rotating sphere

Bonus questions

Examples class problems

5.24 - Vector potential for uniform magnetic field, and inside and outside a solenoid
5.25 - Find the vector potential of an infinite straight wire, inside and outside
5.31 - Magnetic boundary conditions