A directs B to sell goods for him and agrees to give B five percent commission on the price fetched by the goods. A afterwards by letter revokes B's authority, B after the letter is sent, but before he receives it, sells the goods at Kshs. 100,000/=". Is the sale binding on A? Give reasons to your answer. (5 marks) (b) How is the contract of agency terminated? (10 marks)