pls, show all steps in a clear format. especially how to find the bounds/ intervals in question 2. ( volume of solid)

2. (5 p) The velocity of a body moving along a line is v(t) = 37 sin(at) m/sec. Find the total dis- tance traveled by the body from t = 0 to t= 3. (9 p) Let R be region enclosed by the curves y = r', y =4 and r = 0. Find the volume of the solid obtained by rotating the region R about: i) the y-axis, ii) the line r = 4. iii) the line r-axis