$4.$ A simply supported RC beam has width $=300$mm$.$ It is subjected to externally applied load of $(10+0\mathrm{.}1\backslash$times last digit of your ID number$)$ kN$/$m$.$ Assume effective cover $=40$mm$.$

i$.$ Using M$20$ concrete and Fe$415$ HYSD steel, find the total Ast,reqd for either singly $($change the necessary dimensions accordingly$)-$ or doubly$-$ reinforced section, as per relevant data from IS $456(2000)$ and IS SP$-16.$

$25$

ii$.$ Is the section under$-$reinforced, balanced, or over$-$reinforced? $1$