Modify fibo () (Figure 9–33) so that it prints out a message at the beginning and end of each invocation. These messages show the history of the call stack. For example, if fibo(4) is invoked, the...

Modify fibo () (Figure 9–33) so that it prints out a message at the beginning and end of each invocation. These messages show the history of the call stack. For example, if fibo(4) is invoked, the text in Figure 9–36 should be printed. (Hint: For the indentation, pass a String of spaces as an argument. On a recursive invocation, pass a slightly longer String.)

Figure 9–33

Figure 9–36