In a planned study, there is a known population with a normal distribution, = 50, and = 5. What is the predicted effect

In a planned study, there is a known population with a normal distribution, μ = 50, and σ = 5. What is the predicted effect size (d) if the researchers predict that those given an experimental treatment have a mean of
(a) 50.
(b) 52.
(c) 54.
(d) 56.
(e) 47?
For each part, also indicate whether the effect is approximately small, medium, or large.