A gadget store is having a blowout sale on everything they sell. All items are 18% off. In addition, they are giving a coupon worth Php12, 00 off on any gadget on their 500 customer.
1. Write a function that represents the sale price f(p).
2. Write a function that represents the coupon discount g(p).
3. Write a composite function that represents taking the sale discount first, then taking the coupon discount g(f(p)).
4. Write a composite function that represents taking the coupon discount first, then taking the sale discount f(g(p)). 5. Which is the better deal if you go to buy a cellular phone for Php35, 650?​