1. A contract to sell was signed by Mark and Jackson. Only Mark was unaware that such a document was not appropriate since it should have been a sale contract. Only one side suffered from a legal error. Is it possible for them to get out of the contract? Why?
2. Mark and Shine signed a mortgage contract. Both parties signed the contract and made no objections. Shine later claims that she is unable to read and write, but Mark proves that she can do so. Is Shine correct? Why?
3. Mr. Alvin is an insurance agent. He wrote a letter to Mr. John one day, recommending him to accept to the insurance contract. Mr. John received the letter on May 5, 2021, reviewed it on May 10, and on May 15, he sent a letter consenting to the contract. He sent the letter on May 20, 2021, and it arrived at Mr. Alvin's office on May 23. Mr. Alvin read the letter on May 25, 2021 due to his hectic schedule. When was the contract perfected? Why?