1. (40 points) Write a C++ program that computes and displays a commissioned employee's monthly earnings. A commissioned employee earns a commission based on his/her monthly sales. The program begins by prompting the employee to enter his/her monthly sales, then computes the commission based on the table below. The table shows the commission rates for four different ranges of monthly sales values, along with an optional monthly bonus. The program computes the employee's commission by multiplying monthly sales times commission rate (as a decimal). Monthly earnings are computed by adding the monthly bonus (if any) to the commission. Finally, the program displays the employee's monthly earnings as currency (rounded to two decimal places and preceded by a dollar sign). As usual, your program output should resemble the sample runs at the end of this document. (Note: You may want to read the Extra Credit option (below) before starting your solution.) Monthly Sales Commission Rate Monthly Bonus 0