Simplify the following Boolean functions, using K$-$maps

$F(w,x,y,z)={\displaystyle \underset{?}{\overset{?}{}}}(9,10,11,12,13,15)$

Simplify the following Boolean functions, using four variables K$-$maps:

$A^{\text{'}}{B}^{\text{'}}{C}^{\text{'}}+A^{\text{'}}BD+A^{\text{'}}B{C}^{\text{'}}{D}^{\text{'}}+B{C}^{\text{'}}D+$ABCD

Simplify the following Boolean functions

$F(A,B,C,D)=$prod$(0,2,5,8,10,15)$

With the use of maps, find the simplest sum$-$of$-$products form of the function

$F=fg,$ where

$f=ab{c}^{\text{'}}+c^{\text{'}}d+a^{\text{'}}c{d}^{\text{'}}+b^{\text{'}}c{d}^{\text{'}}$

And

$g=(a+b+c^{\text{'}}+d^{\text{'}})(b^{\text{'}}+c^{\text{'}}+d)(a^{\text{'}}+c+d^{\text{'}})$