10. Sketch the Empirical Rule on the graph below. Label the graph clearly. (7 points) -3 -2 -1 0 1 2 3 11. Use the data on Sheet 1 of the data file 245exam2data.xlsx to answer the following. a. What is the proportion of married people in the sample? (3 points) b. Construct a 95% confidence interval for this proportion. (8 points) C. Use the proportion in (a) to determine the sample size needed to calculate a 95% confidence interval that has only a 1% margin of error. (6 points)