Patrick, a 17-year-old, offers to construct a large playground for Mary in her back yard. Patrick tells Mary that the construction will take 15 months. Mary agrees to pay Patrick $20,000 when the project is completed. At the end of 15 months, Patrick has only finished part of the playground. He demands that Mary pay the $20,000, but Mary refuses, because it will cost her more money to clear his unfinished project than it is worth. Patrick sues. Will the Court require Mary to pay?

No, because Patrick is a minor, so the agreement is void

Yes, because Patrick substantially performed under a valid contract

Yes, because the parties formed a quasi-contract

No, because Patrick materially breached the contract