The Zenvox Television Company faces a demand function for its products which can be expressed as Q = 4000 - P + 0.5I, where Q is the number of televisions, P is the price per television, and I is average monthly income.Average monthly income is currently equal to $2,000.Answer the following questions. 

a.Graph the demand curve (sometimes called the "inverse" demand curve) faced by Zenvox at the current income level.Be sure to label this and all graphs you draw carefully.On the same graph, depict marginal revenue.At what price and quantity is Zenvox's total revenue maximized?What is the marginal revenue at this point?Show the calculation.