MATH 65-205-91 On average, women walk at 4.8 kilometers per hour

Question
On average, women walk at 4.8 kilometers per hour (km/h) on reasonably flat terrain. A random sample of 40 average Canadian women is selected and their walking distance for a one hour period is recorded. The mean and standard deviation are found to be 4.5 and 0.4 km/h, respectively.
Perform the appropriate test of hypothesis to determine whether the average walking speed is less than the stated average for women. Use a 0.01 level of significance.
What effect, if any, would there be on the conclusion of the test of hypothesis in the first question if you changed to 0.20?
Find the p-value for this test in part (a) and state your conclusions.
Describe the Type l and Type ll errors for this testing problem.

please show work

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