Hint 1
From the three figures above, it is (at least visually) clear that for a given value of the test statistic z, the p-value of the two-sided test (equal vs. not equal) is the p-value of any of the one-sided tests.
Hint 1
From the three figures above, it is (at least visually) clear that for a given value of the test statistic z, the p-value of the two-sided test (equal vs. not equal) is the p-value of any of the one-sided tests.