A sports drink company would like to determine how the material of its container (glass, plastic or aluminum) and the type of sweetener it uses (real sugar or artificial sweetener) affects the taste of it's drink. Fifty containers will be produced using each of the factor level combinations. Each volunteer in the experiment will randomly be assigned a container of the sports drink and will rate the taste on a scale of 1 to 10. Scores will then be compared for the various treatments. a) Identify the response variable in this experiment. (0.5 marks) b) Identify the factors. (0.5 marks) c) Identify the factor levels. (0.5 marks) d) Identify the treatments. (0.5 marks) e) Suppose at the end of the experiment, it is discovered that scores for tasters who got their drink in a glass bottle with real sugar were significantly higher than for other combinations. Can we conclude that the treatment is the cause? Why or why not? (1 mark)