Q5. This question has two sub-questions. (a) Using the letters C, A, E,G, I, K (allowing repetition). How many different words can be formed if the word contains 2 4 letters? (b) From a group of 6 seniors, 4 juniors and 2 sophomores, a 5-member committee is to be formed. Inyhow many ways can it be done if exactly three committee members are from seniors? REQUIREMENT: Full justification is required for this question. Explain which formula is used and why it can be used.

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