α c={ {Σ k=1 ak 3k and : ακ € {0,2}} Let C be the set defined in Problem 1 above. Define the functions φ : C → [0,1] and ψ : [0, 1] → [0, 1] as follows (Σ)-Σ. Φ k=1 ψ(x) = sup{φ(y) : y € C and y < x}. = What is the range of the function & from last problem?

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