$21-22$

$(a)$ Express the triple integral ${}_{E}f(x,y,z)dVasan$ iterated

integral $in$ spherical coordinates for the given function $f$ and

solid region $E.$

$(b)$ Evaluate the iterated integral.

$f(x,y,z)=\sqrt[\phantom{2}]{x^2+y^2+z^2}$

$f(x,y,z)=xy$