A sample was taken of 106 body temperatures with a mean of 9

A sample was taken of 106 body temperatures with a mean of 98.2 degrees Farenheit. Assume that the population standard deviation (sigma) is known to be 0.62 degrees Fahrenheit. Consider a hypothesis test that uses a 0.05 significance level to test the claim that the mean body temperature of the population is less than 98.6 degrees Fahrenheit. What is(are) the critical value(s)?