After pondering about this question for the better part of half an hour, while watching SC2 :), I was able to figure it all out! :D
for the first two parts where it asks for the flux, phi.
I used the equation Phi = B*n.hat*dA
where B_loop = N * (μ_0/4*pi) * (2*pi*r^2*I) / (z^2+r^2)^(3/2)...