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2. Given the following demand functions, express TR as a function of Q and hence skerd the graphs of TR against Q: (a) P = 4 (b) P = 7/10 (c) P = 10 40 Exercise 2.2 1. (a) If the demand function of a good is given by P = 80 = 30 find the price when Q-10, and deduce the total revenue. (b) If fixed costs are 100 and variable costs are 5 per unit, find the total cost when 10. (c) Use your answers to parts (a) and (b) to work out the corresponding profit. 2. Given the following demand functions, express TR as a function of Q and hence sketch the graphs of TR against : (a) P = 4 (b) P = 710 (c) P-10 - 49 3. Given the following total revenue functions, find the corresponding demand functions (8) TR S0Q - 40 (b) TR = 10