b) The weekly demand and supply functions for a new brand of TV are given by p = -0.2x2 + 150 and p = 0.2x2 + 0.7x + 75 respectively, where p is the unit price in dollars and x is the quantity demanded each week, in units of a hundred. a (i) Determine the unit price when there is no demand. [1 mark] (ii) Determine the quantity supplied when the unit price is set at $95. [2 marks] (iii) Determine the equilibrium price and quantity. [3 marks]