For a certain product, cost C and revenue R are given as follows, where x is the number of units sold in hundreds. Revenue: 898(x - 5)2 + 22R2 = 13,750 dC a. Find the marginal cost a at x=5. The marginal cost is estimated to be $|:|. (Do not round until the nal answer. Then round to the nearest hundredth as needed.) dR b. Find the marginal revenue 5 at x = 5. The marginal revenue is estimated to be $|:|. (Do not round until the nal answer. Then round to the nearest hundredth as needed.) Find the minimum value of the average cost for the given cost function on the given intervals. (300 = x3 + 28x + 432 a.1SxS1O b.105x520