5. Assume there are two ways to purchase cattle feed, described below. For each, write a function to describe how much the producer's feed costs will be in a month, (i.e. Write down expenditures (costs) on feed (E), as a function of the number of tons of feed (t) per month.) (a) Per unit: Pay $100 per ton (b) Membership: Pay$5,000 for an unlimited amount of feed in a month