Problem 2. Use triple integrals to calculate the volume of the solid region bounded below by the cone z - Vr2 + y2 and bounded above by the plane z = a where a is some positive number. Hint: do not use Cartesian coordinates] ( r, 0. 2 ) rdzdrdo OLOL 2 TTY 2 TT r dEdrdo o a Jzadr do - 2 TT - 15 r 2 TT