Consider 3 urns; urn I contains 1 white and 2 black balls, urn II contains 3 white and 2 black balls, and urn III contains 2 white and 3 black balls. One ball is drawn from each urn. What is the probability that among the balls drawn there will be (i) 1 white and 2 black balls, (ii) at least 2 black balls, (iii) more black than white balls?