olsen's contract with archer obligated olsen to pay archer $10,000. archer properly assigns the contract to able. at that time, able notifies olsen about the assignment. olsen, however, forgets and pays the $10,000 to archer rather than able. by this time, able is screaming for his money. but then archer goes into bankruptcy. in this case: group of answer choices olsen is liable to able for $10,000. able is out of luck because olsen performed his obligation by paying archer. olsen is liable to able not for the $10,000, but for his breach of the implied warranty that the assignor is solvent. able is out of luck because his notification was oral rather than written.