Consider Ho: = 72 versus H: > 72. A random sample of 16 observations taken from this population produced a sample mean of 75.6. The population is normally distributed with = 6. a. Calculate the p-value. Round your answer to four decimal places. p = i b. Considering the p-value of part a., would you reject the null hypothesis if the test were made at the significance level of 0.01? c. Considering the p-value of part a., would you reject the null hypothesis if the test were made at the significance level of 0.025?