4. The xed cost borne by Company A is RM40,000 and the production cost is RMS per unit. The company's products are sold at RM12 per unit. Find (a) cost function (2 marks) (b) revenue function (2 marks) (c) prot function (2 marks) ((1) calculate the prot/loss when the production level is 8,000 units. (3 marks) 5. Given that f (x) = 3" and 90:) = 27x'1. Find (a) domain and range for f (x) (2 marks) (b) sketch the graph for f (x) (3 marks) (c) value of x if f (x) = 9(x)