A bar claims that its average wait time is less than 12 minutes from the time a drink order is placed. The waiting times of 40 customers have been recorded. The survey shows that the average wait time is 11 minutes and standard deviation is 2 minutes.

a)the test statistic that can be used to test this hypothesis is a ______ (z, t or f) with a value of ______?

b)if the significant level is 0.05, what is p=value?