New PMP Question & Answers with explanation

The project management team expects that during the course of the project there could be delays in component delivery due to strikes, changes to the permitting processes, or extensions of specific engineering durations. What analysis could be helpful in preparing contingency and response plans to mitigate these issues?
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Ron is a project manager handling an alternate water-supply project. During a project performance review, he notices the following: (i) Activity A, on the critical path, is delayed by four days. (ii) Activity B, not on the critical path, is delayed by nine days. (iii) Activity C, on the critical path, is delayed by two days. (iv) Activity D, not on the critical path, is delayed by five days. In what sequence should Ron prioritize his efforts in addressing these delays?
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Activity attributes extend the description of the activity by identifying various components associated with the activity. Typically, how many attributes are associated with each activity?
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While sequencing activities for a project, the project management team applied certain discretionary dependencies. This was based on their knowledge of best practices within the project application area. What is the potential risk involved in using such dependencies?
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The senior analyst on a project came up with Activity Duration Estimates as follows: Activity A: 10 days + a lag of two days; Activity B: 1 week + a lead of three days. The project manager who reviewed these estimates raised some objections to them. What would they most likely be?
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