$7$ Which of the following would most likely qualify as substantial performance?

Out of spite, Wally stops performing work $10$ days before his contract is finished. Leroy doesn't finish his last $3$ days of yard work under contract because his mother has a medical emergency. Lily contracts to paint house green, but decides to paint it blue instead.

Vivian is under contract to paint $10$ paintings, but only finished $8$ because she is offered a more lucrative contract from someone