Question 6 Two halls= each etzlunllj.r liker to be coloured either red or hlne= are put in an urn. At each stage one of the balls is randome chosen, its colour is noted, and it is then returned to the urn. If the rst two balls chosen are coloured red, what is the probability that (a) both halls in the urn are coloured red; (h) the next ball chosen will he red?I