Given the following circuit, which of the provided Boolean expressions describe that circuit.

A circuit with three inputs $x,y,$ and $z.x$ flows into a NOT gate and then the first AND gate along with $y.$ The first AND gate and $z$ flow into the second AND gate. $x$ and $y$ flow into the third AND gate. $z$ flows into a NOT gate and then the fourth AND gate along with the third AND gate. The the second AND gate and fourth AND gate flow into an OR gate.

$xyz+xyz$

None of these

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

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