based on this scenario: Students applying to graduate schools in many disciplines are required to take the Graduate Record Examination (GRE). An ambitious undergraduate student creates a study program that she believes will greatly increase students' GRE scores, relative to the general population. She recruits a sample of 100students believed to be representative of the larger undergraduate student population and puts them through the study program. Afterwards, they complete the GRE and receive a mean score of M = 720. The population of GRE scores is normally distributed with a mean of = 1100 and a standard deviation of = 200.

please help me figure out this:

What is the effect size for this research scenario (show how you got it)? Based on its value, what kind of impact did the study program have on students' GRE performance? Briefly explain your answer.