Sonny is the owner of an art gallery, and he is selling an original art masterpiece ("Artwork"). In order to set the price, Sonny has the Artwork, appraised. The report says that the Artwork's value is $300,000. Sonny is starting to lose his memory due to age, so he remembers the number incorrectly, and when he negotiates a sales agreement with Nicole, he asks for $30,000. She agrees. 1. After the agreement is made, if Sonny or his family want to attack the sales agreement, what ground could be used? 2. Instead of selling the Artwork, Sonny sells his art gallery to Nicole for $1,000,000. In the sales agreement, he agrees that for the next two (2) years, he will not open another art gallery within 5 miles of the original gallery. What is this type of provision called? 3. The agreement for the sale of the art gallery states that Nicole is required to raise $350,000 from investors or lenders and only after she has raised the funds will she be obligated to finish the purchase. What is the legal term for this provision