what is the answer for 8,9,10. multiple

Norman owes marry.'I Michael sues To enforce the promise, which of me Torowing will be True. The agreement is not enforceable because it is not for a legal purpose; As the agreement was made orally it is not enforceable; Michael will not be able to enforce the agreement unless he can show that he has performed his side of the bargain! The agreement is fully enforceable; The agreement will only be enforceable if Michael can use independent witnesses to prove the existence of the contract. QUESTION 9 When can an offer be withdrawn or revoked; ( H cannot be withdrawn if it is marked "Irrevocable": No less than 10 days after it has been communicated to the other party; No less than 10 days after it has been made; At arry time before It has been nocopted; No less than 5 days after it has been made QUESTION 10 Which of the following wil be most useful to a court in determining the standard of care In a case in which professional negligence has boon alleged: the opinion of a witness; evidence from a law professor : evidence from another qualified person in the same feld