I am having some trouble with these questions thank you in advance for your help

Find Rx y dA where R is the region in the xy plane bounded by y =x2 and y = x.

Find the volume of the solid in the first octant bounded by the plane 2 x + y + z = 2 and the coordinate planes.

Find the volume of the solid between the plane z = 4 and the hyperboloid z =7+x2+y2