8. (2 points) What is the big-O of the following power() function? (Hint: it is in terms of the exponent's value) (Lipshutz?) int power (int x, int exponent) if (exponent == 0). return 1; if (exponent == 1) return x; if(exponent mod 2 == 0) 1/ exponent is even return power (x * x, exponent / 2); else return x * power (x * x, exponent / 2)