Fratton Electric Lid is an electricity supplier that faces domestic and commercial customers (these are denoted 'd' and 'c' respectively. The two sets of customers have the following demand curves: Pa = 60 - Qa P. = 100 -QE 3 Additionally, Fratton Electric Lid total cost curve is given by TC = 10Q a) Initially Fratton Electric Lid cannot easily separate these two types of customers so it sets price on the basis of the total market demand curve (i.c. the horizontal aggregation of the two demand curves above). Calculate the single price that Fratton Electric Lid will charge, the number it sells and the profit it makes. Draw the outcome on a diagram. [10 marks] b) Now Fratton Electric Lid can separate these two markets so it is able to price discriminate. Find the prices it sets in both markets, the sales in each and its overall level of profit. Compare your answer with that in Part (a). [10 marks] c) If you are now advising the government on whether to prevent Fratton Electric Ltd from using price-discrimination, what would your advice be, and why? [5 marks]