QUESTION 13 3 points Save Answer (3+5=8 marks) A solid in the first octant is bounded below by the cone z= {9+}; and bounded above by the hemisphere x2+y2+z2=9. Z > 0. a. Sketch the integral region D of the solid and express the integral region D as a set by using spherical coordinates. b. For the point (x.y.z) in the region D, the density function of the solid is given by the product of 5.: and the distance from the origin to the point (x.y.z)- Use the triple integral in spherical coordinates to find the mass of the solid