(a) How many train simulators does the Passenger Rail Agency of South Africa use to (i) train and (ii) assess its train drivers, (b) how many persons have been trained using the specified simulators in the (i) 2012-13, (ii) 2013-14 and (iii) 2014-15 financial years, (c) how are the persons who have completed their training assessed, (d) when were the simulators purchased, (e) how much did they cost and (f) from where were the simulators purchased?