For a certain population of employees the percentage passing or failing a job competency exam, listed according to sex, were as shown in the table below. that is, of all the people taking the exam, 24% were in the male-pass category, 16% were in the male-fail category, and so forth. an employee is to be selected randomly from this population. let a be the event that the employee scores a passing grade on the exam, and let m be the event that a male is selected. are the events a and m independent? are the events a and f independent?