Clara recorded 50 numerical observations on a certain variable and then calculated the mean \overline{x}x and the standard deviation s for the observations. To help decide whether a normal model is appropriate, she created the following chart.

In Clara's chart, the letters a, b, c, d, and e represent the number of observations falling in each interval. Which of the following list of counts for a, b, c, d, and e respectively, is the best indicator that the variable can be modeled with a normal approximation?