1. S offered to sell his house and lot to B for P2,000,000, who was interested in buying the same. In his letter, S stated that he was giving B a period of one-month within which to raise the amount. One week before the expiration of the one-month period. S told B that he is no longer willing to sell the property unless the price is increased to P3,000,000.

May B compel S to accept the P2,000,000 first offered? Explain.

2. D died leaving property estimated at P1,000,000 to his sons S and T. Subsequently, S sold one-half of his inheritance to X for P300,000, although his share was still to be delivered.

Is the contract valid? Explain.

3. S sold his only car for P100,000 to B. Unknown to S, B bought the car from him so that he could use the same in a bank robbery.

What is the status of the sale of the car by S to B? Explain.

4. D and C entered into a contract wherein D agreed to give to C P50,000 within 30 days from the date of the execution of their agreement, which, however, does not state the consideration received by D from C.

What is the status of the contract between D and C? Explain.

5. On June 1, 2019, S offered to sell his only car to B for P100,000. B accepted the offer by mailing his letter of acceptance on June 10, 2019. On June 12, 2019, B revoked his previous acceptance and mailed his letter of revocation on the same date. S received the letter of acceptance on June 14, 2019 and the letter of revocation on June 15, 2019.

Was the contract perfected? Explain.