The supervisor of a production line believes that the average time to assemble an electronic component is 14 minutes. Assume that assembly time is normally distributed with a standard deviation of 3.4 minutes. The supervisor times the assembly of 14 components, and finds that the average time for completion is 11.6 minutes. Which of the following statements is most accurate? Select one: O a. reject the null hypothesis at a = 0.05, but not at a = 0.01 O b. reject the null hypothesis at a = 0.025, but not at a = 0.05 O c. reject the null hypothesis at a = 0.01 O d. fail to reject the null hypothesis at a