Please show work for both :)

Question 8 1 pts Suppose you are going to conduct a two tail test concerning the population mean. Suppose that you do not know what the population standard deviation is and that you have a sample of 55 observations. If you are going to conduct this test at the .01 level of significance what is the critical value? Be sure to enter a positive number and answer to four decimal places. Question 9 1 pts Suppose you are going to conduct a one tail test concerning the population mean. Suppose that you do not know what the population standard deviation is and that you have a sample of 38 observations. If you are going to conduct this test at the 05 level of significance what is the critical value? Be sure to enter a positive number and answer to four decimal places