hi! i'm not sure how to solve this question

2. You make a purchase at a local furniture store, but what you bought is too big to take home in your car. You arrange to have the store deliver your purchase for you, for a reasonable fee. You pay for your purchase, plus the sales tax, plus the fee. The tax is 5% and the fee is $50. a. Write a function t(x) for the total, after taxes, on the purchase amount x. Write another function f(x) for the total, including the delivery fee, on the purchase amount x