Samuel, Ander, and Guzman borrowed P150,000 from their friend Carla to put up a restaurant orally promising to pay her the full amount after one year. Because of their lack of business know-how, their business collapsed. Samuel and Ander ended up penniless but Guzman was able to borrow money and put up a bookstore which did rather well. Can Carla demand that Guzman pay the entire obligation since he, together with the two others, promised to pay the amount in full after one year? Defend your