Part b [4 marks] VR Ltd has developed a new product: a VR phone called "VR Phone". The demand function for the VR Phone is: P2 = 2400 - 2Q2 P2 and Q2 represent the price & quantity of VR Phone, respectively. The VR Phone has a marginal cost of production of $600 per phone, and a fixed cost of zero. . To maximise the profit from the VR Phone, VR Ltd should produce units of VR Phone. The maximum profit from the VR Phone is S