On February 18, Clancy, who was in debt, took his stereo to Lucys repair shop. Because Lucy and Clancy were old friends, Lucy didnt give him a receipt. On February 19, hounded by creditors, Clancy sold the stereo on credit to Grover, who was to pick it up on February 21 at Lucys, pay Lucy the repair bill, and pay the balance of the purchase price to Clancy. Who is entitled to the radio if, on February 20, Clancys creditor appears with the sheriff to seize the stereo from Lucy? Why?