6. You drive a taxi. If you use premium unleaded, your cab gets 25 miles to the gallon. If you use regular unleaded, you get 23 miles per gallon. Let P stand for a gallon of premium, and R stand for a gallon of regular. a. If output (O) is measured in miles driven, write your production function in terms of the two gasoline inputs. b. In a normal month, you drive 2,300 miles. If regular sells for $1.05 per gallon and premium sells for $1.15, how many gallons of each should you use each month