Answer:
Egbert may disaffirm the contract for the video game on the basis that it is a non necessity item.
Step-by-step explanation:
Egbert may disaffirm the contract of the video game, on the basis that the video game is a non necessity item for him, while claiming that computer chair is a necessity item that will aid him in learning or education.
Note that disaffirmance is a legal term that refers to the right for one party to renounce a contract.
This is a term often used by minor to make a contract of non necessary items to be void. It is often explicitly or verbally expressed by the person (minor)in a declaration or implied when the person involved decides not to abide by the terms of the contract.