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The total cost functions for two soap manufacturers (Plane Soap and Round Soap) are given by equations (i) and (ii) below, (i) TC=12 + 2Q (ii) TC= 0.303 -1502 + 250Q (a) The demand function for both firms is P= 115 - 20. Determine the break-even points algebraically. Plot total revenue and TC on the same diagram for each firm. (b) Comment on the general characteristics of the TC functions. (c) Determine the break-even points graphically and state the range of values of ( (output) for which the firm makes a profit. Comment on the profitability of both firms