A fatigue test is made with a mean stress of 17,500 psi (120 Mpa) and a stress amplitude of 24,000 psi (165 Mpa). Calculate (a) the maximum and minimum stresses, (b) the stress ratio, and (c) the stress range. a.) maximum = 285 Mpa minimum = -45 Mpa b.) ratio = -.158 c.) range = 330 Mpa.