For Problems $3\mathrm{.}7$ to $3\mathrm{.}10,$ determine the values of c$,,4,$ and pM$,$ for the sections shown. $80$ CHAPTER $3$ Strength Analysis of Beams According to $($Ans$.$ M$,=330\mathrm{.}1$ ft$-$k$)$ Problem $3\mathrm{.}721$ in$.24$ in$.4$ #$8$ bars $3$ in$.$ f$,=75,000$ psi $5000$ psi $-12$ in$.$