$3.$ Reduce the following Boolean expressions to the indicated number of literals:

a$.$ A$\text{'}$C$\text{'}+$ ABC $+$ AC$\text{'}$ to three literals

b$.($x$\text{'}$y$\text{'}+$ z$)\text{'}+$ z $+$ xy $+$ wz to three literals

c$.$ A$\text{'}$B$($D$\text{'}+$ C$\text{'}$D$)+$ B$($A $+$ A'CD$)$ to one literal

d$.($A$\text{'}+$ C$)($A$\text{'}+$ C$\text{'})($A $+$ B $+$ C$\text{'}$D$)$ to four literals

$4.$ Find the complement of the following expressions:

a$.$ xy$\text{'}+$ x$\text{'}$y

b$.($AB$\text{'}+$ C$)$D$\text{'}+$ E

c$.$ AB $($C$\text{'}$D $+$ CD$\text{'})+$ A$\text{'}$B$\text{'}($C$\text{'}+$ D$)($C $+$ D$\text{'})$

d$.($x $+$ y $+$ z$)($x$\text{'}+$ z$\text{'})($x $+$ y$)$