1) A assigns a right to collect an account receivable to B. When is the assignment take effect between the parties? When is it effective as against the obligor (O)? 2) B comes to collect from O. O refuses to pay because A did a lousy job and breached the contract. B replies that he is sorry to hear that, but B had no obligation to O so O must still pay B. Who is legally correct? 3) In a delegation of a contractual duty if the delegatee does not perform for the obligee, who is legally responsible...the delegator, the delegatee, both, or neither? 4) What is the difference between an INTENDED third party beneficiary and an INCIDENTAL third party beneficiary?