1. "I will give you a brand new car on your 21stbirthday>" Is this with a period or condition? Reason.
2. A will give B P10,000. May the court fix the duration of the period? Reason.
3. X will give Y any one of the following specific things- a horse, a cow or a pig. Before X can choose, the cow and pig were lost due to his fault. Before X delivers the horse, it was lost because of fortuitous event. Is the obligation extinguished? Reason.

The answers should be based on the Law of Contracts and Obligation in the Phillippines.