Answer the question in the screenshot below. Please explain your steps and write legibly. Thank you!

2. You have been asked to select 30 participants for a drug trial that compares two different treatments for migraine headaches. The researchers have requested a block design (male/female] (with control groups for each block. You have been given a list of 87 people that will participate in the trial. The first 42 people are female and the rest are male. (a) In paragraph form, clearly explain how you will select your sample of 30. (b] Sketch a diagram for the design of this experiment