Aaron bought a television set for personal use from Penny. Aaron properly signed a security agreement and paid Penny twenty-five dollars down, as their agreement required. Penny did not file, and subsequently Aaron sells the television for $300 to Clark, his neighbor, for use in Clark's hotel lobby.

(a) When Aaron fails to make the January and February payments, may Penny repossess the television from Clark?

(b) What if, instead of Aaron's selling the television set to Clark, a judgment creditor levied (sought possession) on the television? Who would prevail?

(c) What if Clark intended to use the television set in his home? Who would prevail?