28 (1 point) A good project manager usually asks two question in a roll when she tries to obtain time estimates from a resource. The first questions is "How long do you think you need to finish Task A?". The second question is "How many hours do you think you need to work on Task A continuously to complete it?" By asking these two questions, a project manager is trying to: understand the difference between duration and effort. know the real estimate and the buffer. figure out how much the estimate is inflated. calculate how much buffer should be added