$($a$)$ Calculate $Q_n=515$ at $Y1=0($Recall that $Y1=0$ means that the PNA is at or above the top of the flange.$)$

$($b$)$ Calculate the moment capacity, $M_n=458k-$ft$,$ for PNA in the slab and $Y2=3.$ Calculate the value of $"$a$"$ if

the thickness of the slab is $6".$

$($c$)$ Calculate $Q_n=260k$ with the PNA at the bottom of the top flange is the force at Y $2$ acting in the

concrete. It is calculated by balancing the tensile and compressive forces above and below the PNA $$

$T=C)$

$($d$)$ Calculate the moment capacity, $M_n=396k-$ft$,$ with the PNA at the bottom of the top flange.