1. Contract entered into by the parties may be subject to certain

events which neither party had foreseen, such that its occurrence can render it rather difficult to continue. May the "Doctrine of Unforeseen Events" be applied in this case? How.

2. Discuss briefly the twin Principles of Integrity and Identity in so far as payment or performance of the obligation is concerned. Are these principles to be applied in the absolute?

3. By way of an example, apply the legal concept of Subrogation in Novation as mode to extinguish an obligation.

4. Differentiate between Expromision and Delegacion as means of personal novation of an obligation.

5. How does the "Presumption of Remission" differ from the "Presumption of Voluntary Delivery" in condonation as a mode to extinguish an obligation. Do these presumption involve a public document or a private document?