2 17 marks] A university professor noticed that students who attend classes regularly achieve better grades. He noticed that 45% of students who attend classes regularly achieve a grade of at least A-, while only 10% of students who don't attend Audu achieve a grade of at least A-. About 65% of students attend classes regularly. A. (3] A student is randomly selected, what is the probability that they achieved a grade lower than A-? B. /4] A students was selected and found to have gotten a grade of at least A-, what is the probability they