Drives Co. sells portable hard drives. They can sell 400 drives when the price is $95/ drive, and they can sell 520 drives when the price is $65/ drive. If x represents the number of drives sold, determine the following. (a) What is Drive Co,'s revenue function? R(x)= (b) What is the price per drive (in dollars) when revenue is maximized? $ (c) What is the maximum profit (in dollars) made from the sale of these drives if Drive Co. incurs production costs of $115 per drive and has fixed costs of $625 ?