Which of the following statements are correct in relation to a misrepresentation?

Which of the following statements are correct in relation to a misrepresentation?

1. A misrepresentation is a false statement of fact or law but not a mere expression of opinion by someone having no expertise in the subject matter of the contract

2. A misrepresentation renders a contract voidable

3. As a general rule silence can amount to a misrepresentation.