Show that fᵧ|ₙ(y;θ) = 3ny³ⁿ - 1/θ³ⁿ if 0 < y < b(and 0 elsewhere) is the probability density. a) fᵧ|ₙ(y;θ) = 3ny³ⁿ + 1/θ³ⁿ b) fᵧ|ₙ(y;θ) = 3n²y³ⁿ - 1/θ³ⁿ c) fᵧ|ₙ(y;θ) = 3ny³ⁿ - 1/θ²ⁿ d) fᵧ|ₙ(y;θ) = 3n²y³ⁿ - 1/θ³ⁿ