Individual Project 1 Read And Analyze The Factual Scenario Below Remember To Ana

Hello, I was wondering if you could help me out with question two of my business law project specifically. I am confused because he is entering into a contract with his sons, one is under the age of 18 so I do not know if it is a contract, because they have parent consent. Also, did he agree to the terms accurately because it does not specifically say that it is a unilateral contract. Please help me out with number four also and any other suggestions you may have for the other questions. 

Thank you