Compute the design moment strength of the rectangular $1221$ in heam

having $3$ im $9$ tensile reinforcement in one layer. Consider that $f_e=3$ksi and G$-60$ksi. Use USD method:

A floor system consists of $3$ in slab supported by $10$ ft span beam. The beams are spaced at $8ft$ centers. The beam has a web width of $14$ in and effective depth of $18\mathrm{.}5$ in$.$ Demonstrate the ffexural design for a typieal interior beam, if factored applied moment is $5080k-$in$.$ Censider that $f=4$ksi, and $f_2=60$ksi. Use USD$)$ method.