ZAIN IQ 9:r 119 will ..ll 2 points A traffic light is installed at a junction of a railroad and a road of cars. The traffic light is controlled by two switches in the rail placed one mile apart on either side of the junction. A switch is turned on when the train is over it and is turned off otherwise. When the beginning of the train is one mile from the junction, the traffic light is changed from green (logic "O") to red (logic 1). The light is changed back to green when the end of the train is one mile away from the junction and S1 is turned off. Assume that the length of the train is less than two miles. The designer needs for ......... states at least to draw a Moore state diagram. * | 1mile 1 mile BE