3. Mark agrees to purchase from Nancy's farm stand "All the fruit I want, all the vegetables I desire, and all the apple cider I wish for the next two years in exchange for Nancy giving me a 20% discount off her normal retail price on the purchases." (Both he and Nancy sign the agreement.) He also enters into a separate agreement with Slippery Oil Corp. to purchase "All the home heating fuel I need for the next two years at a price of $3.75 per gallon." During the next two years, he buys no fruit, vegetables, or cider from Nancy and no home heating oil from Slippery Oil. Is he in breach of either contract? Explain.