Please provide justification for each step:

Also, I am hiring a person who can work together for this semester for Calc 2.

11. The regions Ri (bounded by y = sin(2r), y = 0, c = 0, and c = 1/4) and R2 (bounded by y = sin (2x), y = 0, = = 1/4, and = = #/2) are shown below. y = sin(2x) R2 I. Let A, be the area of R, and A2 be the area of R2. Then: A. Al A2 D. It depends if an integral wrt r or y is used. II. Let Vi and V, denote the volume of the solid obtained by revolving Ri and R2, respectively about c =1. Then: A. VI V2 D. It depends if washer or shell method is used