A news vendor purchases 200 newspaper copies for $1 per paper, and sells them for $1.50 apiece. He can return unsold papers to the distributor for $0.50 apiece. From experience, he knows that demand for papers on any given morning is uniformly distributed between 150 and .250

a. Give the pdf of the demand for newspapers.

b. Find an expression for the stochastic variable that represents the net earnings as a function of the number of copies sold.