6) Find the exact length of the curve. x = sin 3t, y = cos 3t, 0 ts: 26 Section 10.3: 7) Find the points (r,0) where the tangents to the polar curve r = 2(1 - cos 0) are horizontal or vertical. Section 10.4: 8) Set up, but do not evaluate, integrals representing the following areas: a) The area between the inner loop and outer loop of r = 2 cos 0 - 1 b) The area inside r = sin 0-2 and outside r = 5 sin 0. c) The area inside of one loop of r = 2 sin 20 which lies outside the circle r = 1.