SS g(r, 1. The first problem is about this integral: 9(7,0) dA = (r.) dA-cos (6) dr de cos(0) π/4 0 2 (a) Sketch and shade the region D on the axes here. 4 ม -4-3-2-1 3 2 1 I 1 2 3 4 -1 -2 -3 -4 (b) Write equations using polar coordinates for all curves/lines that form the boundaries of region D: (c) Write equations using Cartesian coordinates for all curves/lines that form the boundaries of region D: (d) Write an equivalent iterated integral using Cartesian coordinates. Choose your order of integration wisely. Be precise with your bounds for x and y (You do not need to evaluate this integral.) y.