A professor has noticed that even though attendance is not a component of the grade for his class, students who attend regularly obtain better grades. In fact, 40% of those who attend regularly receive A's in the class, while only 10% of those who do not attend regularly receive A's. About 80% of students attend class regularly. (a) Calculate the probabilities labeled on the tree diagram below. (Round your answers to two decimal places.) a = 0.8 V b = X C = 0.4 d = X e = 0.1 V h = X P = 0.32 n = XXX