A steel column W300 x 203 kg/m section is used as to support an aial load. A=25740mm^2        Tw = 20mm.             Fy= 415 Mpa        Tf   = 32mm.             Lu= 4m d = 340mm.             Ix=5.16*10^ 8 mm^4       Iy= 1.65*10^8mm^4 E = 200GPA    k = 1.0 Sidesway is prevented. Determine the ultimate design capacity of Column using NSCP 2015. Use Phi= 0.9.

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