Which of the following constitute substantial performance? Address each and explain why or why not. 1. Wholesaler contracts with Delicatessen to deliver 50 cases of bottled beverages each month in exchange for $3,000 monthly payment. Due to heavy holiday volume, the December shipment contains only 45 cases. 2. The Yellow Pages agrees to publish a half-page advertisement for Local Dry Cleaner in exchange for $2,000. The advertisement is published, but one digit in the telephone number is incorrect. 3. A vegetable cannery contracts with Farmer to buy 54 units of fancy grade spinach, defined as "dark green in color, firm in texture, and with a leaf/stem ratio of less than 15 percent stem." Farmer delivers spinach with a leaf/stem ratio of 25 percent stem. 4. Widower contracts with Artist to paint a portrait of his late wife. The portrait is done on time and professionally but the likeness, while resembling her, does not look exactly like the woman