Power function of a two-sided LRT

Let $X_{1},X_{2},…,X_{n}$ be a random sample of size $n$ $(n\ge 2)$ from a $N(\mu,1)$ distribution, where $\mu\in\mathbb{R}$ is an unknown parameter. Consider the problem of testing $H_{0}:\mu=5$ against $H_{1}:\mu\neq 5$. Which one of the following statements is true?