How to find the NP decision Rule for false alarm and the power of that decision

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Suppose we observe a random variable Y given by: Y=N+Ө λ where Ө is either 0 or 1, λ is a fixed number between 0 and 2, and where N is a random variable that has a uniform density (-1,1). We wish to decide between the hypothesis H0: Ө=0 Versus H1: Ө=1 a)find the Neyman-Pearson decision rule for false alarm probability ranging from 0 to 1. b) Find the power of the Neyman-Pearson decision rule as a functionof the false alarm probability and the parameter λ. Sketch the receiver operating characteristics.