3. (5 pts} A study by Moderna on CDVID vaccination in children ages 5-11 is running as follows: They recruited 6,795 children ages 5-11 who met certain criteria such as lack of chronic diseases. They randomly divided the children into two groups. Half received a vaccine injection and half received a placebo. Neither the people administering the shots nor the physicians conducting follow-up studies knew which child received vaccine vs placebo. They will follow the children for 2 years and record the children's health outcomes. a) Describe the design of this study using vocabulary terms from this chapter. Be as specific as possible. Include at the very least: Is the study blind? Double-blind? Randomized? What are the control and treatment groups? What is the population and what is the sample? b} Is this study likely to give reliable results. based on its design? Why or why not