16. Challenge: Using only SAR, ADD, and XOR instructions (but no conditional jumps), write code that calculates the absolute value of the signed integer in the EAX register. Hints: A number can be negated by adding 1 to it and then forming its one’s complement. Also, if you XOR an integer with all 1s, its 1s are reversed. On the other hand, if you XOR an integer with all zeros, the integer is unchanged.