The corner column shown is reinforced with $1220$ mm $$ bars, fy $=415$ MPa and f$$c $=21$ MPa. Determine the location of the plastic centroid of the section measured from the x and y $$ axes. For all bars use fs $=$ fy$.$

x $=217\mathrm{.}643$ mm ; y $=161\mathrm{.}358$ mm

y$=217\mathrm{.}643$ mm ; x$=161\mathrm{.}358$ mm

x $=275\mathrm{.}674$ mm; y $=157\mathrm{.}697$ mm

y $=275\mathrm{.}674$ mm ; x $=157\mathrm{.}697$ mm

None of these