Plot the functions $y_1=si{n}^2(t)$ and $y_2=cos(3t)$ within the interval from $t=0$ to $t=1s,$ with $0\mathrm{.}01s$ increment; both on the same graph. Add a title for graph, label for $x$ and $y$ axis, and a legend. Suppress intermediate outputs in all codes.

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$(35$ pts$)$