$(4pts)By$ completing the $limits$ and integrand, set $up(without$ evaluating$)an$ iterated inte$-$

gral that represents the desired volume.

$(a)$ Volume $of$ the solid below the paraboloid $z=4-x^2-y^2$ and above the $xy-$plane.

volume $={\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}},{\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}},dydx$

$(b)$ Volume $of$ the ice cream cone bounded $by$ the cone $z=\sqrt[\phantom{2}]{x^2+y^2}$ and the hemisphere

$z=\sqrt[\phantom{2}]{2-x^2-y^2}.$

volume $={\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}},{\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}},dxdy$