A shell script containing the following code is executed:

	if x
	then
	    y
	else
	    z
	fi

a) Write the command 'x' (either as a shell script, or in C if you prefer) so that the command 'y' will be executed.

Sample solutions:

    exit 0

    int main() { return(0); }

    cat /dev/null

b) Write the command 'x' (either as a shell script, or in C if you prefer) so that the command 'z' will be executed.

Sample solutions:

    exit 1

    int main() { return(1); }

    rm / 2>/dev/null

    false

    test 3 -eq 4