Question 2 (10 marks) A food retail shop sells pies for $5 each. The daily cost function has the form C(x) = 1.2x + 12 + 0.01x2, where x is the number of pies sold on a typical day. profit (1) Write down the daily total revenue function in a and specify its domain. profit (2) Compute the first-order derivative and the stationary point of the daily total revenue function. profit (3) Find the value of a that will maximise the daily total revenue function. (4) Use the and derivative to confirm that the stationary point derived in (2) is a maximu point. maximum