please help me solve this question

5. A factory has three machines that make watches. The daily production and percentage of defective watches are given in the following table. la) If a watch is selected at random, find the probability that (ll the watch is defective, (ii) the watch is made by machine A, given that the watch is defective, (ill) the watch is made by machine 8, given that the watch is not defective. lb) If three watches are selected at random, find the probability that (ll all of them are not defective; (ill at least one of them is defective; (ill) exactly one watch is defective. (Give the answers correct to 4 decimal places.) l12marlrs)