Re$-$draw the following Karnaugh$-$Map and minimize the output function $Z$ into;

$AB$

so

$($a$)$ A minimal sum$-$of$-$products $($SOP$)$; $Z=?$

$(4$ Marks$)$

$00$

$($b$)$ A minimal product$-$of$-$sums $($POS$)$ ; $Z=?$

$(4$ Marks$)$