Passenger and freight trains are operated between stations I and II where the distance between stations is 2.4km. The speed of the passenger trains is 100km/h and the speed of the freight trains is 60km/h for a single line railway track. The waiting time for passenger trains is 1.B min. and ID min. for freight trains. It is possible to operate 2C freight trains/day and the daily operation time is 21 hours. 6.1. Calculate the number of passenger trains that will be operated daily per direction. (10p) 6.2. If the speed of the passenger trains increased 30%, determine the amount of increase in the number of passenger trains that will be operated daily per direction. (10p)