If the volume of the solid bounded by the plane $z=4$ and the paraboloid $z=5-x^2-y^2$ is given by $V={\displaystyle \underset{0}{\overset{a}{}}}{\displaystyle \underset{0}{\overset{b}{}}}(c-r^2)rdrd,$ then $4a2b-c=$

Select one:

$6$

$8$

$4$

$9$

$7$