I need solve this MCQ questions

QUESTION 18 If Salem induces Ahmad, by fraud, to make a contract with him, the contract would be void. ( ) O True O False QUESTION 19 Contracts that cannot be performed by the parties because of the non-existence of the subject-matter are: a. Valid contracts O b. Unenforceable contracts O c. Illegal contracts Od. Executed contracts QUESTION 20 X agrees to pay Y $.100,000 if Y Kills Z and claims $.100,000. Y cannot recover from X because the agreement between X and Y is: a. illegal Ob. Voidable O c. Void O d. Unenforceable QUESTION 21 If an expert engineer (hired by the buyer of an airplane) does not tell the buyer about a technical problem in the airplane, the engineer would be liable for: a. Duress O b. Mistake O c. Undue influence O d. Misrepresentation QUESTION 22 Which of the following factors would generally cause a contract to become voidable? O a. Duress O b. Fundamental mistakes O c. Undue influence Od.a+ c QUESTION 23 Contracts to commit crimes are: O a. Voidable contracts O b. Unenforceable contracts O c. Illegal contracts O d. Executed contracts QUESTION 24 If the offeror dies after having made an offer and the offeree is notified of the death, the contract would be: a. Unenforceable b. Void O c. Voidable Od. Not concluded QUESTION 25 If Walid causes Hazim to become drunk, without Hazim's knowledge, in order to make Hazim sign a contract with him, then the contract would be voidable because of: a. Duress O b. Mistake O c. Misrepresentation d. Lack of capacity