The contents of memory locations X and Y are 5 and 4 respectively. If the following assembly code is run with these initial values what would be the contents of X, Y and the register R after the 2nd. and 4th lines are executed?

1. LOAD Y
2. ADD X
3. STORE X
4. DECREMENT X

After line 2: X=Blank 1 Y=Blank 2 R=Blank 3

After line 4: X=Blank 4 Y=Blank 5 R=Blank 6