For No$.61-63$ Using Ultimate strength design, determine the following.

$61.$ Determine the maximum allowable moment $($Mn$)$

a$.444\mathrm{.}444kN-m$

b$.472\mathrm{.}220kN-m$

b$.476\mathrm{.}020kN-m$

d$.584\mathrm{.}380kN-m$

$62.$ Determine the actual steel$-$concrete ratio $($pact$)$

a$.0\mathrm{.}0068$

b$.0\mathrm{.}0079$

c$.0\mathrm{.}0071$

d$.0\mathrm{.}0083$

$63.$ Determine the max. steel$-$concrete ratio $($ max$)$

a$.0,0205$

b$.0\mathrm{.}0227$