I want the answers to this

The waiting time to check out of a supermarket has had a population mean of 10.97 minutes. Recently, in an effort to reduce the waiting time, the supermarket has experimented with a system in which there is a single waiting line with multiple checkout servers. A sample of 50 customers was selected, and their mean waiting time to check out was 8.93 minutes with a sample standard deviation of 4.2 minutes. Complete parts (a) through (d). Click here to view page 1 of the critical values for the t Distribution. Click here to view page 2 of the critical values for the t Distribution, a. At the 0.10 level of significance, using the critical value approach to hypothesis testing, is there evidence that the population mean waiting time to check out is less than 10.97 minutes