1.Chong is obliged to deliver his dog Kobe, or his car with plate no. XXX 888, or a particular iPhone to Celso. If Chong has already made his choice which prestation to deliver, can he still change his choice? Why? When is the choice of Chong effective?

2.Celso and Jun are obliged to deliver a particular car to Engie and Jun. On delivery date, Engie demands delivery of the particular car from the debtors. Celso wants to deliver while Jun does not want to deliver. Celso wants his obligation to be extinguished. May Celso be compelled to deliver the particular car? Why? What is the remedy of Celso so that his obligation can be extinguished?

3.Chong and Jun promised to pay PhP10,000.00 to Engie and Frankie. On due date, Engie demands payment from Chong. How much must Chong pay to Engie? Why?

4.Jun promised to deliver a gold necklace to Peter. They agreed in case of default, Jun will deliver a subsidiary penalty of PhP10,000.00 to Peter. Jun is in default. What is will Jun deliver to Peter? Explain.

5.Jun promised to deliver a gold bracelet to Jenny. They agreed that in case Jun is in delay, he will deliver a joint penalty of PhP10,000.00. Jun is in delay. What will Jun deliver to Jenny? Explain.