James Owed Christie $2,500

Essay

James owed Christie $2,500.She asked him to make the payments to her friend,Agatha,and they drew up and signed a contract to that effect.After he had made a couple of payments,Christie died,and James told Agatha he would not give her any more money.There is $2,300 still outstanding.
A)Explain why Agatha cannot simply sue James for breach of contract to get the balance of the money.
B)Identify the equitable remedy available to Agatha,and describe how it would operate to help her here.
C)What should Christie have done to ensure that Agatha could enforce the contract if Christie was not there to do so?