An l$-$beam has a flange width $b=350mm,$ height $h=350mm,$ web thickness $t_w=12mm,$ and flange thickness $t_f=19mm$ Use the following steps to calculate the shear stress at a point $100mm$ above the neutral axis.

Part A $-$ Moment of inertia

The shear formula includes the moment of inertia of the whole cross section, I, about the neutral axis. Calculate the moment of inertia.

Express your answer with appropriate units to three significant figures.

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$I=$

Part B $-$ Q for the given point

The shear stress $100mm$ above the neutral axis depends on the value of $Q$ for the area above that point. Calculate the value of $Q.$ Express your answer with appropriate units to three significant figures.

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