Use a 10 level of significance to determine the critical

Question

Consider the following hypotheses:

H₀: μ = 470

H_A: μ ≠ 470

The population is normally distributed with a population standard deviation of 44. Use Table 1.

a. Use a 10% level of significance to determine the critical value(s) of the test. 

b. Use p-value an test at 5% level of significance