14. Given a four-person challenge group composed of two male students, Jia and Yi, and two female students, Bing and Ding, participating in a knowledge-based question challenge activity organized by a TV station. The activity consists of four rounds. The probabilities of male students passing the first to fourth rounds are $\frac{5}{6}, \frac{4}{5}, \frac{3}{4}, \frac{2}{3}$, respectively; the probabilities of female students passing the first to fourth rounds are $\frac{4}{5}, \frac{3}{4}, \frac{2}{3}, \frac{1}{2}$, respectively.
(1) Find the probability of male students passing all four rounds;
(2) Let $\xi$ represent the number of people in the four-person challenge group who pass all four rounds. Find the distribution and expectation of the random variable $\xi$.