2) Here are the heights of seven male giraffes (in m): 5.3 4.9 6.3 5.0 6.2 6.0 5.7 (a) Test Ho: u = 5.63. Use a = 0.05. (b) Repeat, but now test Ho: / = 5.0. Again, use a = 0.05 (c) Finally repeat (b) except use a = 0.01. (d) What happened as you went from b to c (explain!)