Provide a trace program: 100 If, Load X 101 Subt Y 102 Skipcond 400 103 Jump Else 104 Then, Load X 105 Add X 106 Store x 107 Jump Endif 108 Else, Load Y 109 Subt X 10A Store Y 108 Endif, Halt 10c x, Dec 10D Y, Dec 222 12 20 for the first 4 instructions of the following /Load the first value. /Subtract the value of Y, store result in AC /IE AC-0 (X-Y), skip the next instruction Jump to Else part if AC is not equal to 0 /Reload X so it can be doubled /Double X /Store the new value /Skip over the false, or else, part to end of it /Start the else part by loading Y /Subtract X from Y /Store Y-X in Y /Terminate program (it doesn't do much!) /Assume these values for X and Y