7) Netflix has changed its pricing model to restrict users from sharing their account. It now has a base subscription cost of $5 per month and an additional fee of $3 for every additional IP address linked to the account. a. Write a linear function that describes the pricing model. Clearly define all variables b. How much will it cost to have 7 additional IP addresses on your account? C. If you have to pay $25 a month to Netflix, how many IP addresses would be linked to your account?