4.01) Keith's Sheet Music needs a program to implement its music teacher's discount policy. The program is to prompt the user to enter the purchase total and to indicate whether the purchaser is a teacher. The store plans to give each customer a printed receipt, so your program is to create a nicely formatted file called .stdout. Music teachers receive a 10% discount on their sheet music purchases unless the purchase total is $100 or higher. In that case, the discount is 12%. The discount calculation occurs before addition of the 5% sales tax. Note: To display a % sign, use %%. All numbers in your output should have 2 places of precision but %, which should have 0 places of precision . Your output MUST be to a file names .stdout (C language coding)