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Plot[Piecewise[{{0*y, y <= 50}, {0.05*y, 50<y<=100}, {0.1*y, 100<y<=150}}], {y, 0,150}]
Plot[Piecewise[{{0*y, y <= 50}, {0.05*y, 50<y<=100}, {0.1*y, 100<y<=150}}], {y, 0,150}]
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