Answer the given question with a proper explanation and step-by-step solution. C++ 11.12 LAB: Fibonacci sequence (recursion) The Fibonacci sequence begins with 0 and then 1 follows. All subsequent values are the sum of the previous two, for example: 0, 1, 1, 2, 3, 5, 8, 13. Complete the Fibonacci() function, which takes in an index, n, and returns the nth value in the sequence. Any negative index values should return -1. Ex: If the input is: 7 the output is: Fibonacci(7) is 13 Note: Use recursion and DO NOT use any loops. main.cpp #include using namespace std; int Fibonacci(int n) { /* Type your code here. */    } int main() { int startNum; cin >> startNum; cout << "Fibonacci(" << startNum << ") is " << Fibonacci(startNum) << endl; return 0; }

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Answer the given question with a proper explanation and step-by-step solution.

C++ 11.12 LAB: Fibonacci sequence (recursion)

The Fibonacci sequence begins with 0 and then 1 follows. All subsequent values are the sum of the previous two, for example: 0, 1, 1, 2, 3, 5, 8, 13. Complete the Fibonacci() function, which takes in an index, n, and returns the nth value in the sequence. Any negative index values should return -1.

Ex: If the input is:

7

the output is:

Fibonacci(7) is 13

Note: Use recursion and DO NOT use any loops.

main.cpp

#include <iostream>
using namespace std;

int Fibonacci(int n) {

/* Type your code here. */
  

}

int main() {
int startNum;

cin >> startNum;
cout << "Fibonacci(" << startNum << ") is " << Fibonacci(startNum) << endl;

return 0;
}

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