Design the solid slav systme $($ beam and slabs $)$ shown in figure below, subjected to the superimposed dead load $1\mathrm{.}5K\frac{N}{m^2}$ and factorial live load $4\mathrm{.}8K\frac{N}{m^2},$ beam width $bw=350mm$ column dimension $350**350mm,$ assume normal concrete, $fc=21$Mpa, and $fy=250$Mna.