Can you give us any hints? I tried findobj() but can't make progress!
You are on the right track with findobj(). The trick is what the call to "legend" does to the objects that make the solution very simple.
Make a checkerboard matrix
Tune your guitar
Replace May with April
Calculate the integral of the polynomial
Generate a NaN...on purpose
Big numbers, least significant digits
Big numbers, repeated least significant digits
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