Please explain those questions.

1. In a unilateral contract, the contract is formed once the offeree decides to perform the task

True or False

2. Express contracts are only enforceable if they are in writing

True or False

3. An offeree writes a letter of acceptance with the stipulation that the offeror must lower the selling price by 25%. The offer remains open

True or False

4. An offer is made to sell a house, and the offeree has deposited an acceptance letter in the mailbox, but it has not been received by the offeror and the offeror revokes the offer. The offeror is not required to sell the sell.

True or False

5. A contract granting a corporation the right to use new data tracking software is governed by the Uniform Commercial Code.

True or False

6. A car salesman, an employee at a large dealership, makes an offer to a customer then has a heart attack and dies. The customer then accepts the offer and a valid contract isformed

True or False

7. The one year rule of the statute of frauds dictates that if parties agree to a contract and it ends up taking more than one year to perform, then it must be in writing.

True or False

8. A written contract cannot be modified by prior promises

True or False