Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical value to /2, (b) find the critical value za / 2, or (c) state that neither 40 the normal distribution nor the t distribution applies. The confidence level is 90%, o is not known, and the histogram of 63 player salaries (in thousands of dollars) of football players on a team is as shown. Frequency 20- 10 0 4000 8000 12000 16000 20000 Salary (thousands of dollars) Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. ta/2 = (Round to two decimal places as needed.) O B. Za/2 = (Round to two decimal places as needed.) O C. Neither the normal distribution nor the t distribution applies