The shown five$-$span one$-$way slab is supported on $300$ mm wide beam with center$-$to$-$center spacing $,$ The slab carries a superimposed dead load $($SDL$)$ of $1$ kN$/$m$^2$ and a live load of $4\mathrm{.}5$kN$/$m$^2.$ Using fc$\text{'}=25$MPa, fy $=420$ MPa and unit weight of concrete $=24$ kN$/$m$^3,$ design the slab. Draw a cross section showing the reinforcement. Also locate the bar cut$-$off points.