] 4. Find z-eomponent of the centre of mass of a solid of uniform density bounded by 2:3 + if + z2 2 16, z = I], U, and z = 0. or E 15] 5. Suppose D is the region on the ry-plane bounded by y = 0, y? = 2x, and y? = 3 - z. a) Define and sketch the region D on the xy-plane. X (b) Use a double integral to find the volume of the vertical solid bounded from below by D and bounded above by 1 the plane z = ,y