1. Find the volume of the solid above the paraboloid z = x² + y² and below the half-cone z = √x² + y². Steps:(a) Sketch the surfaces z = x² + y² and z = √√x² + y². The projection of the solid onto the xy-plane is the integration region D. (b) Find the intersection of the solid, if needed. (c) Set up the double integral that gives the volume of the solid. (d) Evaluate the double integral using the iterated integrals.