1. give two cases when a person may be released from an obligation validly entered into

2. give some cases when loss of the specific thing to be delivered will not exempt the obligor from liability even in the absence of fault or delay

3. What is the effect of payment in an incapacitated person?

4. In the extinguishment of obligation, what is the effect of payment by third person?

5. X owes Y 1 million at the time of X's payment, Y was already insane. Supposed that Y spent 600,000 for his personal and medical need while the other 400,000 was used by him to light a bonfire. Is the obligation is extinguished? please explain your answer.

6. W owes Y 1Million. Later W, paid Y 600000 leaving a balance of 400000.

X, W's former boyfriend and intending to surprise her; paid Y the sum of 1million thinking that W still owed Y the said amount. X paid Y without the knowledge of W. How much can X recover from W . please explain your answer.