Using DeMorgan's Law, write an expression for the complement of $F$ if $F(x,y,z)$

$=x{y}^{\text{'}}(x+z)$

Using DeMorgan's Law, write an expression for the complement of $F$ if $F(x,y,z)=(x^{\text{'}}+y)(x+z)(y^{\text{'}}+z{)}^{\text{'}}$