A food retail shop sells pies for $5 each. The daily cost function has the form C(30) = 1.23: + 12 + 0.01332, where a; is the number of pies sold on a typical day. profit (1) Write down the daily total revenue function in m and specify its domain. f pro it (2) Compute the rst-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 second derivative to conrm that the stationary point derived in (2) is a maid-mu point. maximum