9-18 Evaluate the triple integral. 9. fffy dV, where E={(x, y, z) | 0≤x≤ 3,0y ≤ x, x - y ≤ z < x + y} 10. fel dv, where = 11. SE {(x, y, z) | 0≤ y ≤ 1, y < x < 1,0≤ z <xy} Z x² + z² dV, where E={(x, y, z) | 1 y≤4,yz< 4,0 < x < z} 12. sin y dV, where E lies below the plane z = x and above the triangular region with vertices (0, 0, 0), (π, 0, 0), and (0, π, 0) 13. 6xy dV, where E lies under the plane z = 1 + x + y and above the region in the xy-plane bounded by the curves y= √√x, y = 0, and x = 1