A 12.5 mm diameter cylindrical rod fabricated from a 2014-T6 alloy is subjected to repeated tension-compression load cycling along its axis. The magnitudes of the maximum tensile and compressive stresses during cycling are 350 MPa and 50 MPa, respectively. Remember that compressive stresses are negative quantities. Estimate the fatigue lifetime of this cylindrical rod (in years), if it is cycled between these stress states sinusoidally with a frequency of 0.01 Hz. You may assume that the curves in Fig. 12 represent a 100% chance of failure.