Discuss the seller's duty to guarantee the purchaser against eviction. In your discussion, address the following: (i) the definition of "sale" and how this definition relates to the seller's obligation to guarantee against eviction; (ii) the different forms of eviction; (iii) the duties of the purchaser when eviction is threatened; (iv) the remedies of the purchaser when the duty seller's guarantee has been breached; and (v) when the guarantee against eviction does not protect the purchaser.