When converted to an iterated integral, the following double integrals are easier to eval- uate in one order than the other. Find the best order and evaluate the integral. y cos(ry)dA; R-{(1,y) |0 ≤ 1 ≤ 1,0 ≤ y ≤/3} JJ₁² (b)(1+zA; R={(x,y) |0 ≤z≤4,1≤ y ≤ 2}