Power Curves from Normal Distribution.

The following is a homework problem that I cannot figure out because I am having trouble finding the Type II error.

Construct a power curve for the $\alpha = 0.05$ test of $H_0:\mu = 60$ versus $H_1: \mu \neq 60$ if the data consist of a random sample of size $16$ from a normal distribution having $\sigma = 4$

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