Chapter 5, Problem 25PS

If originally $\text{x}=\text{4, y}=\text{0, and z}=\text{2,}$ what is the value of x, y, and z after executing the following code?

$\begin{array}{|l|}\hline \text{if }\left(\text{z}==\text{0 |}\text{| x \&\& !y}\right)\hfill \\ \text{if }\left(\text{!z}\right)\hfill \\ \text{y}=\text{1;}\hfill \\ \text{else}\hfill \\ \text{x}=\text{2;}\hfill \\ \hline\end{array}$