Assume that we want to construct a confidence interval. Do one of the following, as appropriate: (a) find the critical O value to / 2, (b) find the critical value za/2, or (c) state that neither the normal distribution nor the t distribution applies. 40- 30- The confidence level is 90%, o = 4020 thousand dollars, and the histogram of 56 player salaries (in thousands of Frequency dollars) of football players on a team is as shown. 20- 10- 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.) OB. Za/2= (Round to two decimal places as needed.) O C. Neither the normal distribution nor the t distribution applies