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I have only one question, how could I plot the following function correctly?

> f:=x->piecewise(x<-1,1,x=0,2,1);

f := x -> piecewise(x < -1,1,x = 0,2,1)

I try this command but I do not reach the correct result.

> plot(f,-3..3, style=point,discont=true,numpoints=100);

[Maple Plot]

Could you help me, please? Thank you.

plot

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