Problem $04\mathrm{.}052-$ Moment capacity of a reinforced concrete beam

A concrete beam is reinforced by three steel rods placed as shown. The modulus of elasticity is $3{10}^6$ for the concrete and $29{10}^6$ psi for the steel. Using an allowable stress of $1352$ psi for the concrete and $20$ ksi for the steel, determine the largest allowable positive bending moment in the beam.

The largest allowable positive bending moment in the beam is $$ kip.ft$.$