怎么样回答BUSINESS LAW的问题,格式

怎么样回答BUSINESS LAW的问题,格式
以下有一题很SIMPLE的问题,想知道正确的格式和步骤去回答这个问题~
a.Wang jin's father promises that if he passes his business law exam with a Credit or above he will buy him a new car.Wang jin accepts the offer.He works hard,and passes with a Distinction.His father is very pleased refuses to honour his promise.Can Wang Jin sue for breach of contract?
b.Assume that eventually Wang Jin graduates,gets Permanent Residency and becomes a citizen.His father,who is now widowed and living alone in Beijing,promises his son that if he sponsors his emigration to Australia and looks after him he will make a will leaving all his property to him.Wang Jin sponsors his father and has an extra room added to his house.However soon after arriving in Australia he and his father argue.His father refuses to honour his promise to leave his property to him.Could Wang Jin sue for breach of contract?