$7\mathrm{.}11$ Express the following complex numbers in rectangular

form:

$($a$)$ z$1=2$e jp$/6$

$($b$)$ z$2=3$e$$jp$/4$

$*($c$)$ z$3=$

$$

$3$ e$$j$3$p$/4$

$($d$)$ z$4=$j$3$

$($e$)$ z$5=$j$4$

$*($f$)$ z$6=(2+$ j$)2$

$($g$)$ z$7=(3$ j$2)3$