help in c++ with explanation would be great!

Assignment 2 CS222. Program #2. 15 points + 2 extra) Re-write a program to compute Fibonacci number using a recursion Fibonacci numbers have the property that each consecutive number is a sum of two preceding: 0,1,1,2,3,5,8, 13. 21... Your program should ask user for the integer, and output the result, which shows Fibonacci number at that position. For example if user enters 5. program should output 3' (fifth position in the series) Your program should use recursive function to compute and return back to the main the Fibonacci number Extra points: Add another function to calculate Fibonacci number using the loop (not the recursion). These two methods should give you the same result. Main asks user for the input, calls the function(s) to calculate the Fibonacci number, and outputs the result back to the user. Comment your program: Programmer: Your name Purpose: State the purpose of the program Class: CS222 Assignment number 2. Describe all variables Describe important section of code. Grading Comments Indentation Meaningful variables names Program runs Correct input and output Total Extra: Function to calculate Fibonacci numbers with the loop 2 points 2 points 2 points 4 points S points 15 points 2 points Deductions: Run-away recursion: -5 points How to submit: Submit the source file (.cpp) and the run file (.txt) on or before the due time