In cell B3, find the number of customers who are "Satisfied" from the Data sheet. Hint: use the COUNTIF function. In cell B4, find the sample size of the sample of customers who responded from the Data sheet. Hint: use the COUNTA function. In cell B5, find the proportion of customers who are satisfied. In cell B6, find the standard error of the proportion. Hint: Use the formula standard deviation = sqrt(p*(1-p)). To build the confidence interval for the proportion of satisfied customers from the Data sheet, what is the appropriate probability table to use? Choose the correct answer from the dropdown menu in cell B7. In cell B8, find the value from the appropriate probability table to construct a 90% condence interval. Hint: use the NORM.S.INV function