Assume that the number of executives in the population equals the number of students. Let (x,, I ) be the profit-maximizing "executive package", where x, is the number of articles the executive can access at a total charge of TE , and (x , Ty ) be the profit-maximizing "student package", where X,, is the number of articles the student can access at a total charge of Ty . Is x, = 100? Is X, = 80? Explain. Derive the values of X,, Ty, Xy. Tu