Evaluate the triple integrals below:

$($a$){\displaystyle \underset{0}{\overset{\sqrt[4]{x}}{}}}{\displaystyle \underset{0}{\overset{z}{}}}{\displaystyle \underset{0}{\overset{x}{}}}12y^2{z}^{3}sin{x}^{4}dydxdz$

$(5$ marks$)$

$($b$){\displaystyle \underset{0}{\overset{2}{}}}{\displaystyle \underset{1}{\overset{2}{}}}{\displaystyle \underset{0}{\overset{1}{}}}yz{e}^{x}dxdzdy$

$(5$ marks$)$

Evaluate ${}_{D}xyxzyzdV$ where

$D=\{(x,y,z)|-1x1,-2y2,-3z3\}$