In reference to Applied Example 9.7 (p. 425): a. Verify that t(44) = 1.92 is significant at

Question:

In reference to Applied Example 9.7 (p. 425):
a. Verify that t(44) = 1.92 is significant at the 0.05 level.
b. Verify that t(44) = 3.41 significant at the 0.01 level.
c. Explain why t(44) = 1.81 p < 0.10 makes sense only if the hypothesis test is two-tailed.
d. If the test is one-tailed, what level would be reported?