How do I solve #36? I cannot figure out how to properly set up this integral right now my bounds for each of the two integrals is -1 to 1. I that right? Please show me how to solve this problem

35-38. Surface integrals using an explicit description Evaluate the surface integral SIs f(x, y, z) dS using an explicit representation of the surface. 35. f(x, y, z) = xy; S is the plane z = 2 - x - y in the first octant. 36. f(x, y, z) = x2 + y2; S is the paraboloid z = x2 + y, for 37. f(x, y, z) = 25 - x2 - y2; S is the hemisphere centered at the origin with radius 5, for z 2 0. 38. f(x, y, z) = er; S is the plane z = 8 - x - 2y in the first octant. 39-42. Average values ol nerd morigained andi sol 39. Find the average temperature on that part of the plane 2x + 2y + z = 4 over the square 0