3. 10 pts possible Which of the following integrals are im- 1. 12 only proper? I+2 2. none of them 1 = -dx , x+1 3. 12 and 13 only 1 12 = : dx , VI+ x 4. 13 only 5. I1 and 12 only 13 = 1 + x2 dx . 6. all of them 7. I1 and 13 only 8. I1 only4. 10 pts possible Find the total area under the graph of Q 1, Area. = 00 I 8 y = 3 u 2- Area. = 6 z formal. O 3- Area=5 m 11 \\J 4. = Area 2 O 5- Area. = 4 9 6. = - Area 2 6. 10 pts possible Find the slope in the zdirection at the point P(0, 2, f(0, 2)) on the graph of f when f(x, y) = 2(2x + y)e_\". O 1. slope O 2. slope O 3. slope O 4. slope O 5. slope 6 2 7. 10 pts possible Evaluate the integral 1. 1 = 18 - 5 I= JA 2re3ry dxdy 2. I = e6 18 - 7 ) over the rectangle O 3. I = A = {(x,y) : 0