I need some help with this:

Given: int x,y,z What are the values of x,y and z after the following code segments have been executed?

x=2; y=0; z=2;

if(x)

{

if(y)

z=1;

}

else

z=3;

The answer is x=2, y=0, and z=2 I have no clue how to do this. This is my first programming class and I would greatly appreciate any help on this! Thanks so much