An urn contains 3 red balls and 2 blue balls. A ball is drawn. If the ball is red, it is kept out of the urn and a second ball is drawn from the urn. If the ball is blue, then it is put back in the urn and a red ball is added to the urn. Then a second ball is drawn from the urn.

A .Draw a probability tree

b.What is the probability that both balls drawn are red?

c.If the second drawn ball is red, what is the probability that the first drawn ball was blue?