A health and safety committee is to be selected from all the people who work at a local factory. The committee is to consist of four members selected randomly from a list of ten names. The list has five union members and five workers and five workers who are not union members.
(a) What is the probability that the first person selected from the list is a union member?
(b) What is the probability that the first two people selected from the list are union members?
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