A train timetable shows the following information. a train following route a leaves for the airport every 14 minutes. a train following route t leaves for the nearest town every 20 minutes. a train following route a and a train following route t both leave at 7:32am. a) Work out the next time a train for each route is set to leave at the same time. Some assumptions had to be made to answer part a). Select all the ones that apply from the list below: A - there is no train breakdown, B- no train gets cancelled, C-the trains are travelling at a constant speed, D - the trains depart/ arrive on time