a. If originally x=4, y=0, and z=2, what is the value of x, y, and z after executing the following code
if(x!=0)
y=3;
else z=2;
b. In the given code fragments, what is executed
if x=5, y=4, and z=9?
if(y==7)
if(x==5)
if(z==9)
x++;
else z++;
else x--;
else y++