can someone help?

(m) [2] Consider the region R bounded by the curves y = x and y = Vx. Identify all correct formulas. (I) The volume of the solid obtained by rotating R about the r-axis is 7 (x -x2) dx. (II) The area of R is (x - vx) dx. (III) The volume of the solid obtained by rotating R about the y-axis is (32 -y4) dy. (A) none (B) I only (C) II only (D) III only (E) I and II (F) I and III (G) II and III (H) all three