Question No$.3.$ Beam, shown below is having a cross section of $22$ in $12$ in$.,$ reinforced with $6$#$9$ bottom bars in $2$ layers and $2$#$4$ top bars. Use fc$\text{'}=4$ksi and $fy=60$ksi.

a$.$ What will be the minimum depth of the beam, considering deflection criteria of ACl $318-14?$ Is the beam satisfying the minimum requirement?

$(2$ Marks$)$

b$.$ Calculate the flexural capacity $(Mn)$ of the beam.

$(9$ Marks$)$