If you are a senior, You must be the one who know everything and answer all question.
From my experience, it is very important that the one who prepare the report must be the one who present it. Also, I attended thousands of meetings, and people always ask questions to the one who presents the information or the slides. Sometimes, I see some senior leave this tasks to juniors, but in my opinion, this approach is not a good one.
The one who prepares the report must present the report, and the one who prepare the report must present it, So it i better for seniors to be the one who prepare the report, presenting it and answer the question.
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