For every one-dimensional set C, define the function Q(C) = C f(x), where f(x) = (2/3)(1/3)

For every one-dimensional set C, define the function Q(C) = Σ_C f(x), where f(x) = (2/3)(1/3)^x, x = 0, 1, 2, . . . , zero elsewhere. If C₁ = {x : x = 0, 1, 2, 3} and C₂ = {x : x = 0, 1, 2, . . .}, find Q(C₁) and Q(C₂).