Short Answer #2 (24 points) - NOTE: For this question, please treat all differences between cells or means greater than one as being statistically significant. A researcher is examining the effects of caffeine consumption and sleep on academic performance. First, 100 participants are randomly assigned to one of two sleep conditions: either a full night of sleep (N = 50) or complete sleep deprivation (N = 50). Upon entering the lab, all participants are randomly assigned to receive either a caffeine supplement (N = 25 per sleep condition) or a placebo pill (N = 25 per sleep condition), and are then administered a 10-question test. The researchers obtain the following pattern of results. (Values on the y-axis reflect the average number of correct answers on the test.) 10 . . Caffeine O-NWAOOVOO CO Placebo Sleep Deprived Normal Sleep a. What type of design is this? (Be as specific as possible; 2 points). b. How many main effects were observed? (2 points) c. Describe each of the main effects as specifically as possible (e.g., "There was a main effect of X, such that. . .; 4 points)