You are evaluating an after-school program designed to increase the normalized math scores of students who were in the treatment group of the original Balsakhi program. How many individuals would you need in each group in order to measure an effect size of a fifteenth of a standard deviation? Calculate your answer assuming power of 80%, an alpha of 0.05, and even numbers of students in the treatment and control groups. Base your calculations on an individual randomization that does not take baseline covariates into account. If using Stata, use the "power" command. If using R, use the twomeans command available as part of the exercise materials. Hint: Normalized math scores at baseline are given by the variable "pre_mathnorm" in the Balsakhi dataset.