A beam undergoes cyclical loading with a maximum bending moment of $850$ kNm and a

minimum bending moment of $425$ kNm $.$ The beam has a moment of inertia of $2$x$10^(-4)$m$^(4)$ and

the distance from the neutral axis to the outermost beam fiber is $0\mathrm{.}01$ m $.$ If the material is steel

with an uncorrected endurance $($fatigue$)$ strength of $300$ MPa and the corrected endurance

strength is $150$ MPa $,$ find the factor of safety. BOX YOUR FINAL ANSWER.