Rohan, an eighty-three-year-old invalid, employs a nurse, Sarah, to care for him. Prior to Sarah’s employment, Rohan executed a will leaving his entire estate to his only living relative—his great-grandson, Leon. Sarah convinces Rohan that Leon is dead and gets Rohan to change his will, naming Sarah as his sole beneficiary. After Rohan’s death, Leon appears and contests the will. Discuss the probable success of Leon’s action.