Study each of the following cases. Answer the questions that follow with Yes or No.

Scher, a homeowner, purchased a vacuum cleaner from a door to door salesperson. When the salesperson demonstrated the machine in her home, it seemed to work quite effectively. After signing the contract, she checked several business rating websites and learned that the company was noted for its deceptive practices and that the demonstration machine was specially constructed and not the same type as the one a consumer gets.
a. Does Scher have the opportunity to terminate the contract?
b. Was the contract Scher signed a valid one?
c. Is the contract voidable?