using any method to evaluate

13.7: Problem 6 Previous Problem Problem List Next Problem (1 point) Let er be the unit radial vector and r = Vx2 + + z2. Calculate the integral of F = e er over: (a) The upper-hemisphere of x2 + 1 + z2 = 36 , outward-pointing normal (b) The region on the sphere of radius r = 8 centered at the origin that lies inside the first octant x, y, z 2 0 (a) Is F . dS = 72pie^-6 (b) Is F . dS = 72pie^-8