Explain each number

Country: Philippines

1.S sold to B a car for P1M. The condition for the sale is for B to execute a chattel mortgage on the thing sold. The term of the sale is for B to pay a down payment of P200,00 and the balance to be paid on July 15, 2020. However, the balance was not paid by the buyer so S foreclosed the chattel mortgage on the thing sold. It was sold for P700,000. Can S recover the deficiency? Give reason/s?

2.S sold to B a car for P1M. The condition for the sale is for B to execute a chattel mortgage on the thing sold. The balance of 800,000 is payable in twenty equal installments. B defaulted on the succeeding installments. S sued B for the collection of the balance and the court rendered judgment in favor of S. S by execution of judgment sold the car for P700,000. Can S recover the deficiency? Give reason/s?

3.S sold to B a car for P1M. The condition for the sale is for B to execute a chattel mortgage on the thing sold. The balance of 800,000 is payable in twenty equal installments. B defaulted on his 2 or more installments so S foreclosed the mortgage and sold it for P700,000. Can S recover the deficiency? Give reason/s?