A student makes a trip once per day to the store, and he always buys a snack. The student eats the snack 85% of the time, but the other 15%

of the time, his room mate eats it first. a. During a period of four days, the student keeps track of whether he gets to eat his snack. What is the sample space of possible outcomes? (10 points) b. Let X be the number of times, within the four day period, that he gets to eat his snack. What is the mass of X? (10 points) d. Draw the PMF graph. (10 points) c. Let X be the number of times, within the four day period, that he gets to eat his snack. What is the CDF of X? (10 points) d. Draw the CDF graph. (10 points)