Answer:
P(A) is the Power set.
Step-by-step explanation:
{},{G},{R},{A},{D},{E},{V},{I},{G,R},{G,A},{G,D},{G,E},{G,V},{G,I},{G,R,A},{G,R,D}.{G,R,E},{G,R,V}{G,R,I}{R,A,D}{R,D,E}{R,E,V},{R,V,I}, and so on
