Help with parts a,b,c,d Show work

Of the 10,000 students at a certain university, 7000 has Visa cards (V), 6000 have MasterCard (M), and 5000 have both cards. Suppose a student is randomly selected. a. What is the probability that the student has a Visa card? b. What is the probability that the student has both Visa and MasterCard? c. If the student selected has a Visa card, what is the probability that the student also has a MasterCard? d. Recall that two events are independent if P(A n B) = P(A)P(B) or P(A|B) = P(A). Using probabilities, are the events V and M independent