Roller Riders and Equipment (RR&E) leased bicycle equipment from Bobs Leasing. The lease said nothing about assignment. Bobs Leasing then assigned the lease to TBA as security for a loan. Bobs Leasing defaulted on its loan, and RR&E failed to make several payments on the lease. TBA sued RR&E for the lease payments. Was the assignment valid, given the fact that the original lease made no mention of it? (Explain why or why not) If the assignment was valid, may RR&E raise defenses against TBA that it could have raised against Bobs Leasing? (Explain your answer).