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Beam deflection and Stress at centroid?

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Sometimes the term centroid throws me for a loop. So, how would I set this problem up?

I'm asked to determine the deflection of the tip of a beam and max direct stress and location for a 2000N load.

Given load=2000N, on the tip of a 1m beam. Beam dimensions are H=80mm B=W=40mm and t=thickness of 1.5mm.

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For a cantilever beam with a point load at the extreme end, maximum deflection occurs at the ...

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The solution looks at beam deflection and stress at centroids for a given load.

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