The competing hypotheses for a particular hypothesis test are as follows: H 0 : > 2500

The competing hypotheses for a particular hypothesis test are as follows: H₀: μ > 2500 seconds H_a: μ < 2500 seconds Assume the population standard deviation is known to be 140 seconds and that you intend to take a random sample of size 49. Using a significance level of .10, 

a. state your decision rule in seconds.

b. If the sample mean is 2462 seconds, should you reject the null hypothesis? Explain.