[Favi's Furniture] Favi took out a loan from First Bank and executed a security agreement which gave First Bank rights to any after-acquired property as collateral. A year later, Favi took out a loan with Second Bank and executed a security agreement with Second Bank using his new delivery truck as collateral. Favi eventually defaulted on both loans. If First Bank had properly perfected its security interest, which creditor's interest would take priority?