
===>

so we have
so the two objects, the paraboloid and the sphere intersect form z = -1 to z = 2
so we have the triple integral
now, when z = 0 is the xy-plane so we have that

for the paraboloid and

for the sphere
so the radius is going from

remember that

also the angle θ varies as follows
using cylindrical cordinates we have

the integration is straight forward from there.
Hope this helps