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Determine the critical region and critical values for z that would be used to test the null hypothesis at the given level of significance, as described in each of the following:

Ho:mean less than or = to 82 and Ha:mean is greater than 82, a=0.10

Ho:mean=44 and Ha:mean is not equal to 44, a =0.01

Ho:mean greater than or = to 17 and Ha:mean is less than 17, a=0.05

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