Plz answer 1 and 2. Based on complex numbers. Will be highly thankful

For the second problem,

From the given info, we can write z1/z2 = Aexp^(ipi/2) = Ai where ( A is any constant which is = mod(z1/z2)

Now from the given problem, we can rewite it as :– mod((3(z1/z2 - 5)/(3(z1/z2 + 5))

rewrite above as:

mod((3Ai - 5)/(3Ai + 5)), The modulas of numerator and denomenator will be same and thus the ans will be 1.

*First Question – Its length so kindly ask it separately again on the forum.

Best of Luck!