Problem $5$: $(10$ marks$)$ The figure shows the region $of$ integration for the integral

${\displaystyle \underset{0}{\overset{1}{}}}{\displaystyle \underset{0}{\overset{1-x^2}{}}}{\displaystyle \underset{0}{\overset{1-x}{}}}f(x,y,z)dydz$

rewrite the integral $in$ the other five orders.