Jumiel, a well-known singer, agrees to sing at the wedding of his cousin Amoy. Jumiel refuses to accept payment from Amoy and tells her "this is your wedding present". On the day of the wedding, Jumiel cannot sing as he is very hoarse.

a) Citing relevant case law, advise Amoy whether she can bring an action against Jumiel.(10 marks)

b) Jumiel is contracted by Island Travel Vibes Ltd. to sing at a retirement party for the Human Resource Manager. He is paid days before the party. On the day of the party, Jumiel cannot sing as he is hoarse.

Explain to Island Travel Vibes Ltd. the basis upon which Jumiel may be discharged from his contract with them. Cite relevant case law to support your answer.