Just $4\mathrm{.}41$ please! The $612-$in$.$ timber beam has been strengthened by bolting to it the steel reinforcement shown. The modulus of elasticity for wood is $1\mathrm{.}8{10}^6$ and for steel is $29{10}^6.$ Knowing that the beam is bent about a horizontal axis by a couple of moment $M=450$ kip$*$in$.,$ determine the maximum stress in $(a)$ the wood, $(b)$ the steel.

Fig. P$4\mathrm{.}41$