1. Ralph, a plumber by trade, has a class reunion at his house. There is a substantial amount of food that is left over. He sells the food to his neighbor, Norton, for a fraction of its original price. In eating this food, Norton sustains injuries from a piece of glass that was contained in an unopened can of salmon. Norton sued Ralph for the injuries he sustained, basing his claim on a theory of implied warranty.

Is Ralph liable to Norton ? Why or why not ?