3. Suppose that the annual number of doctor visits per year, D, is related to the price per doctor visit, P, by the relation D = 4.22 - 0.0444P. a) When the price is $50 per visit, how many visits are there per year? How much are expenditures on visits? b) Suppose the individual obtains insurance. There is no deductible, and the coinsurance rate is 10 percent. How many visits to the doctor occur now? What are the individual's out-of-pocket costs? How much does the insurance company pay? How much are total expenditures