Select the correct answer from each drop-down menu. A bell-shaped curve is plotted in the first quadrant of the coordinate plane. The right boundary is at 11.4. The peak of the curve is centered at 7.8. The data represented by the graph is normally distributed and adheres to the 68-95-99.7 rule. The standard deviation of this data is , and % of the data is either less than 4.2 or more than 11.4.