2. Using only price and quantity, what is the simplest possible revenue function? How could you modify the revenue function for Canada Post to account for the possibility that ad-mail demand is potentially affected by the number of packages being processed by Canada Post? (Hint: it may be useful to express Quantity as a function, similar to how f(x) suggests that f is a function of x, or similar to how f(x,y) suggests that f is a function of x and y.) (1 pt)