1-2. In the subject, The Law on Obligations and Contracts, what is the answer for these? Thank you!

4. Gavin donated a lot to Mico believing that the latter is his illegitimate son. However, Gavin found out later on that Mico is not his son. Is the contract valid? Can Gavin le an annulment of contract? Explain. 5. Mark, 3. 17 year old boy, entered into a contract of loan amounting to Php10,000.00 with B who is insane at the time of the execution of the contract. The contract entered into between the parties is voidable. True or False? Explain