1. Gio, 21 years old, entered into a contract of sale with Len involving Gio's PS5 for P500. Is the sale valid? Why or why not? Explain.

1. ABC is engaged in the business of printing and/or engraving names in any item such as towels, pens and cups. Pedro went to ABC to order for personalized gifts for the coming holidays but wanted the names printed on chopping board as he owns a meat shop. ABC accepted the order but asked for 1 month as they needed to have the chopping board made from Ifugao. Is the contract one of sale or for a piece of work? Explain.
2. A negotiable promissory note was signed by A for B. B indorsed the same to C and C to D. D's signature was forged by X and X indorsed the promissory note to E then E indorsed the same to F. Can F enforce the promissory note against B and C? Explain.*