I'm not saying physics is a piece of cake, but come on, those are mostly plug and chug. You find impedence and inductance with the formulas. You already have all your values so what's the difficulty? Once you have that you can find the angle by simple pre-calc. That's problem one.
Prob. 2 - again you have all your values. Plug/chug/do what you have to to separate imaginary and real numbers, etc.
If this is satire (which I'm starting to think it is), I can't believe I fell for it and wrote all that out.