Don't care terms

Don't care terms are the minterms which does not dictate overall function value. We can treat don't care term $($x$)$ as $1$ if needed to further reduce the expression. Use K$-$Map to reduce the following function with different don't care terms.

F$($W$,$X$,$Y$,$Z$)=\backslash$Sigma m$(1,3,7,11,15)+$ d$(0,2,5)$

$=$ YZ $+$

$($with don$$t care term $5)$