Find the first four values of the variable y as the code in Listing 6.12 is run. The C code for Prob.6.5. #include void main (void) { WDTCTL = WDTPW|WDTHOLD; int a = 4; int mask = 0x0003; int y = 0xFFFF; while (a) { a - = 1; y = (y^mask)&a; } while (1); }