HURRY PLEASE!
Given W=V2(cos(pi/4) + i sin (pi/4)) and z=2(cos(pi/2) + i sin (pi/2)), what is w-z expressed in polar form?

A. V2(cos(pi/4) + i sin(pi/4))
B. V2(cos(3pi/4) + i sin (3pi/4))
C. V2(cos(5pi/4) + i sin(5pi/4))
D. V2(cos(7pi/4) + i sin (7pi/4))