Question 5 A group of zombie athletes wanted to see if there was a supplement that would help them be stronger for the Zomble Olympics. They decided to try a product one of them created that would boost their protein levels so they would have more muscle. The athletes were divided into two groups of 10 zombies each, and one group received the placebo and the other group received the protein boost. They trained in their respective events just like normal, and tracked their results. For example, sprinter zombies tracked how fast their 100 m dash was over a period of 6 months. Identify: 1) The Independent variable (2) Dependent variable 3) At least 3 control variables​