A bag contains 4 white, 3 black, and 6 green balls. Balls are picked at random. Explain why the events picking a white ball and then another white ball without replacement are dependent. Then, identify the probability.

a. P(white) is different when it is known that a white ball has been picked already.
P(white and white) = 4/11

b. P(white) is the same when it is known that a white ball has been picked already.
P(white and white) = 1/12

c. P(white) is the same when it is known that a white ball has been picked already.
P(white and white) = 1/9

d. P(white) is different when it is known that a white ball has been picked already.
P(white and white) = 1/13