*5 The table gives the demand and supply schedules for chocolate brownies in the United Kingdom. Price Quantity Quantity (pence demanded supplied per brownie) (millions per day) 50 5 3 60 4 4 70 3 5 80 2 6 90 1 7 a If brownies are not taxed, what is the price of a brownie and how many are consumed? b If brownies are taxed at 20 pence each, what is the price and how many brownies are consumed? Who pays the tax?