Question: Graph not displaying after plot.

I am running Maple 2021 and have this plot in Differential Equation. However, It will not display the Graph.

The  general solution : y = 1.42
                  "exp(-0.125*t)*sin(1.41*t)"

NULL;
soln := y(t) = 1.42*exp(-0.125*t)*sin(1.41*t);
         soln := y(t) = 1.42 exp(-0.125 t) sin(1.41 t)

(b) Plot y vs. t  and y' vs. t on the same axes.
Let y and dy be the right side and derivative , respectively, of soln. Graph y and dy together

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