As a smart consumer, you are always on the lookout for sales, coupons, andrebates. While shopping for new clothes, you notice that one particular brand ofshirts is on sale for 20% off the original price. You also have a coupon for $10 off a$40 purchase. Coupons are applied after the 20% discount is taken. If each shirtoriginally costs $17.99, how many shirts would you need to buy to be able to useyour coupon? Show your work. (15 points)