The Table below provides details of the demand for Avnnn' West Coast return train tickets from London to Lancaster on Weekday mornings before 9.30 am. 2511} \" i] Calculate the overall demand elasticity for all travellers as well as those for groups A and B over the full range of fares {i.e., 25.13] to :El'i'll]. (3 marks} ii} In the light of the answers to i], identify the characteristics of consumer Groups A and B. What policy ought Amati West Coast adopt to prevent over-crowding on their morning trains? (3 marks}