(4 marks) A very unethical track coach was interested in discovering whether a new drug "Go-Fast" would increase the speed of his sprinters. He tested the drug by giving it to half of his sprint team and using the other half as a control. Then he timed the two groups over 100 metres. For the controls (N=17) the mean time was mean = 9.0, s = 2.0 secs and for the experimental group (N=15) mean = 11, s = 3.0 secs. (Assume that proper testing procedures were followed). a) What are the independent and dependent variables in this experiment? (1 mark) b) What precaution should the coach have observed when dividing the subjects into groups? (1 mark) c) What can the coach conclude about "Go-Fast"? Include t-test results and provide a results statement (2 marks)