5. Traffic light signals and it possible outcomes

Kavya was crossing a four-way junction road on a bus; there she saw the 4 traffic lights on the road. What are all the total possible outcomes of those traffic lights, which Kavya can see.

 

[Note: Here the traffic lights contains only red, green, yellow colour signals. Also, assume that all possible outcomes are possible at a time in the 4 traffic lights.]

 

 

Kavya could see the  number of possible outcomes from the 4 traffic light signal on the four-way junction road.