A lawyer was given an authority by means of a Special Power of Attorney by his client to sell a parcel of land for the amount of P3 Million. Since the client owed the lawyer P1 Million in attorney's fees in a prior case he handled, the client agreed that if the property is sold, the lawyer was entitled to get 5% agent's fee plus P1 Million as payment for his unpaid attorney's fees. The client, however, subsequently found a buyer of his own who was willing to buy the property for a higher amount. Can the client unilaterally rescind the authority he gave in favor of his lawyer? Why or why not? (4%)