1. Use a double integral in polar coordinates to find the area inside the circle (x-1) + y=1 and outside the circle centered at the origin both of radius 1. 2. Evaluate the triple integral fff z dV where E is bounded by the cylinder y+z = 9 and the planes x = 0, y=3x, z=0 in the first octant. 3. Use a triple integral to find the volume of the solid enclosed by the parabolic surfaces y=x+z and y=8-x-z. y=x+z y=8-x-22