Consider 4 cards, on each of which is marked off a side I and side 2. On card I, both side I and side 2 are colored red. On card 2, both side I and side 2 are colored black. On card 3, side I is colored red and side 2 is colored black. On card 4, side 1 is colored black and side 2 is colored red. A card is chosen at random. What is the (conditional) probability that if one side of the card selected is red the other side of the card will be black? What is the (conditional) probability that if side 1 of the card selected is examined and found to be red side 2 of the card will be black?