Rework the problem above assuming the beam is rectangular $($with a $16in.$ width, same as the web width$).$ How much does the T$-$beam moment capacity increase $($in percent$)$ as compared to the rectangular beam assumption due to the composite action with the flange? Hint: Typical situation where a rectangular precast beam carries a non$-$composite cast$-$in$-$place slab, or vice versa. Both can also be cast$-$in$-$place. The rectangular beam will be $16$ in$.x28$ in$.$ section, if the cover addition is about $4$ in$.$ for two rebar layers.