Brian is Paul’s father. In January this ye

问题：

Brian is Paul’s father. In January this year, Paul orally agreed with Brian to decorate Brian’s apartment at cost. Subsequently, they signed a written agreement, which reflected all the terms that they had agreed. In April, Paul completed the decoration. However, Brian has refused to pay to Paul the cost.Required:In relation to contract law, advise Paul as to whether he can commence legal action against Brian to recover the cost. (10 marks)