William Schmalz entered into an employment contract with Hardy Salt Company. The contract granted Schmalz six months’ severance pay for involuntary termination but none for voluntary separation or termination for cause. Schmalz was asked to resign from his employment. He was informed that if he did not resign he would be fired for alleged misconduct. When Schmalz turned in his letter of resignation, he signed a release prohibiting him from suing his former employer as a consequence of his employment. Schmalz consulted an attorney before signing the release and, upon signing it, received $4,583.00 (one month’s salary) in consideration. Schmalz now sues his former employer for the severance pay, claiming that he signed the release under duress. Is Schmalz correct in his assertion?