need help with these!

If an offeree mails a rejection of an offer on a Monday and then changes their mind and mails an acceptance of the offer prior to the offeror receiving the rejection in the mail there is a a. an acceptance of the offer under the mailbox presumption. b. a rejection of the offer because the mailbox presumption. c. a rejection of the offer under the first to mail rule. d. none of the above QUESTION 18 If an offeree signs a contract while being dangled over the side of a building the contract is a. valid. b. voidable: c. void because of physical duress. d. vold because of fraudulent misrepresentation. Threatening to take legal action based on a valid good faith reason makes a contract a. valid. b. voidable. c. void because of an improper threat. d. void because of fraudulent misrepresentation. QUESTION 20 If a lawyer enters into a contract with their client, a likely defense to enforcement of the contract would be? a. duress b. fraud in the execution c. fraud in the inducement d. undue influence