I would appreciate some help in solving this. Thank You

I will only solve (a), so then you can apply what I did in (a) to (b) and learn.

tan(angle)=\(\frac{opposite}{adjacent}\)

Lets say a is MP, and b is MN

So tan is a/b

we know that tan(36) and b=28

So \(tan(36)=\frac{a}{28}\)

Solving for A we will get 20.3