Consider the following recursive function. 1 int mystery (int a) { 23 2 3 4} if(a == 1) return 2; return 1 + mystery (a/10) + mystery (a/10); a. Which line in the above code implements a Recursive Case? [Select] b. Which line in the above code implements a Base Case? [Select] c. What is the output of the program for mystery(10)? [Select] c. What is the output of the program for mystery(-5)? [Select] ne >