ad$)$ Calculate, As$,$max and Asb

b$)$ Is the section UR $($under reinforced$)$ and why? Show it by calculating i$)$ c$,$ and ii$)$ strain.

c$)$ Find $Mn$ and $\frac{O}{M}n$

given:

$f_y=60$ksi

$f_{c^{\text{'}}}=5$ksi

Cross$-$section$-1$

Cross$-$section$-2$

solve cross section $3$ please