A typical T$-$section resulting from a monolithic construction of the slab and its supporting beams,

Effective flange width, bf $=1,095mm$

Slab thickness, $t=147mm$

Web width, $b_w=368mm$

Total depth below the slab $=441mm$

Bottom reinforcement $=4-28mm$ bars

Use $f^{\text{'}}c=22\mathrm{.}62$MPa and $fy=415$MPa.

Allowable stresses are $0\mathrm{.}45f^{\text{'}}c$ and $0\mathrm{.}5fy.$

Concrete cover to the centroid of reinforcements $=70mm$

Calculate the maximum steel stress $($in MPa $)$ if $M=160\mathrm{.}26kN-m.$