Question $5(2$ ooints$)$

We consider the boolean function fof degree three described in the below truth

Which of the following expressions is the correct sum of Product expansion of $f?$

$x\frac{y}{b}ar(z)+xyz+\frac{x}{b}ar(y)z+\stackrel{}{x}yz+\stackrel{}{x}\frac{y}{b}ar(z)+\frac{x}{b}ar\frac{y}{b}ar(z)$

$xyz+\frac{x}{b}ar(y)z+x\frac{y}{b}ar(z)+\stackrel{}{x}yz+\frac{\stackrel{}{x}}{b}ar(y)z+\frac{x}{b}ar\frac{y}{b}ar(z)$

$y+z$

$xyz+x\frac{y}{b}ar(z)+\stackrel{}{x}yz+\stackrel{}{x}\frac{y}{b}ar(z)+\frac{x}{b}ar(y)z+\frac{\stackrel{}{x}}{b}ar(y)z$

$yz+\frac{y}{b}ar(z)\frac{+}{b}ar(y)z$