(a) Evaluate the integral J J(2y +x)dA, where D is the region in the first quadrant bounded by x = 0, y = 0, y = 1 and x2 + y = 4. [5] (b) Use double integrals to find the area of the region D inside both polar Curves r = 1 - cos 0 and r = 1 + cos 0