Please refer to Civil Code of the Philippines (Obligations and Contracts) to answer the following.

1. Mr. A, a businessman, put several real estate properties under the name of his eldest son X because at that time, X was the only one of legal age among his four children. He told his son he was to hold those assets for his siblings until they become adults themselves. X then got married. After 5 years, Mr. A asked X to transfer the titles over three properties to his three siblings, leaving two properties for himself. To A's surprise, X said that he can no longer be made to transfer the properties to his siblings because more than 5 years have passed since the titles were registered in his name. Do you agree? Explain.

2. X sold Y 100 sacks of rice that Y was to pick up from X's rice mill on a particular date. Y did not, however, appear on the agreed date to take delivery of the rice. After one week, X automatically rescinded the sale without notarial notice to Y. Is the rescission valid?

3. Jo-Ann asked her close friend, Aissa, to buy some groceries for her in the supermarket. Was there a nominate contract entered into between Jo-Ann and Aissa? In the affirmative, what was it? Explain.