1. Build a PLC ladder program for controlling traffic light sequence of a 4-way intersection. 2. Green lights will be ON for 80 sec and yellow lights for 10 sec. 3. Implement a system where, if the traffic is low in one lane, other lane’s green lights will be ON before 90 sec. 4. On the west side there is an extra button (x) to help crossing the street from west to east. When a pedestrian presses “x”, it forces give the ladder diagram. can be with hand drawing. as soon as possible