8. A statistics professor wishes to find out the relationship between the classification of a student and the students' grade in the course. The following is a breakdown of the grades and classification of students in three sections of the course. (Hint: Transform the raw data below into marginal and joint probabilities) First Year Sophomore Junior a. b. c. The probability that a randomly selected student makes a D or F in the course. The probability that a randomly selected student is a junior and makes at least a B in the Given that we have randomly selected a senior, what is the probability that they will not make an A in the course ?