$($Canonical forms$)$ Derive the sum$-$of$-$minterms and product$-$of$-$maxterms

canonical forms for the folowing Boolean functions.

a$)$ F$=$x$$y$$z

b$)$ F$=$z$\text{'}$w$\text{'}+$xy$\text{'}$w$\text{'}+$xy$\text{'}$z