Trace the following programs. Show the successive values stored in each variable in a column in the right margin. Assume the user enters the following values in this exact order: 1, 3, 1, 13, 1, 4, 2
1.
#include <iostream>
using namespace std;

const double BOOK_PRICE = 9.00;

int main()
{
   int numBooks = 0;
   int totalBooks = 0;
   int userInput = 1;
   double totalPrice = 0.0;

   while (userInput == 1)
   {
      cout << "Enter 1 for more books or 2 to quit: ";
      cin >> userInput;
      
      if (userInput == 1)
      {
         cout << "Enter quantity of books: ";
         cin >> numBooks;

         if (numBooks > 0 && numBooks < 10)
         {
            totalBooks += numBooks;
         }
      }
   }

   totalPrice = totalBooks * BOOK_PRICE;
   cout << totalPrice << endl;
   return 0;
} // end of main

2.

#include <iostream>
using namespace std;

int main()
{
    int debt = 10000;
    int years = 0;

    while (debt > 0 && years < 100)
    {
        debt = debt - 2000;
        years++;
    }
    cout << years << endl;

   return 0;
}// end of main