Evaluate the double integral. 9x cos(y) dA, D is bounded by y = 0, y = x², x = 5 Evaluate the double integral. SJ 7y² dA, D is the triangular region with vertices (0, 1), (1, 2), (4, 1) Evaluate the double integral. SS 3y 6x5 +1 dA, D = {(x, y) | 0 ≤ x ≤ 1, 0 ≤ y ≤ x²}