Damien was playing a card game with his sister. In order to come up with a strategy, he was trying to guess how many cards she was holding. He knew there are at most 50 cards in the deck and there were 10 cards in his hand and 12 cards in the discard pile. Write an inequality to represent how many cards Damien's sister could be holding. Explain how you know. Damien believes his sister has 28 cards. Explain why this is or is not possible.