You are buying shirts for the math club members. The t-shirt company will charge you according tothe number of shirts you purchase.If you purchase less than 10 the cost is $15.00 per shirt.If you purchase 10 or more but less than 50 you pay $12.00 per shirt.. If you purchase 50 or more you pay $10.00 per shirt.Which function models the cost of the shirt, C(x), based on the number of shirts, x, you purchase?