Question 7 (20 points) A computer system is being used to control the flow of traffic through a railway station. There are always a certain number of trains which have to cross the station every minute. There are signaling lights controlling the traffic and train access to the railway station and out of it. There are also presence sensors they detect the presence of the trains on specific sections of the railway tracks. There are also sensors and or methods through which the computer can detect the fact that a light is functional or not and also if a sensor is transmitting correct signals or not. The computer has to interact with all of the above and control each and every section of the railway by light up the correct light bulb and by commuting the railway switches in the proper positions such that accidents are avoided. Based on the above how you will rate this system: a. A hard real-time system b. A soft real-time system C. An interacting real-time system d. A general computer system