New PMP Question & Answers with explanation

To control the schedule, a project manager is reanalyzing the project to predict project duration. This is done by analyzing the sequence of activities with the least amount of flexibility. What technique is being used?
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You are managing a project that has a task to translate several pages of a document into Spanish. This is similar to a project done last year when a document was translated into German. You are not sure how long it will take to translate into Spanish, so you look at the project plan from the German translation and use that activity duration for your current project. What type of estimating is this an example of?
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While developing your project schedule, you have asked everyone to provide a list of planned vacations over the next three months, and you have applied this information to the tasks that each person is responsible for. What also needs updating?
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You are running one week behind on a project due to a late delivery by a vendor. You are forced to compress your project schedule due to a government-mandated end date that constrains your project. After meeting with your team, the decision is to work several tasks in parallel that were scheduled to be run consecutively. This is an example of:
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A technique that calculates multiple project durations with different sets of activity assumptions and variables is:
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