Performing mathematical operations on equation

Q. A, B, C, D, and E play a game of cards. B has 6 cards less than E and A has 6 cards less than D. A and B together have a third of the number of cards D and E have. If B has two cards less than what C has and the total number of cards is 30, how many cards does B have?

1. 5
2. 3
3. 4
4. 2