New PMP Question & Answers with explanation

During the course of the project, the project management team developed a forecast for the estimate at completion (EAC) based on the project performance. Which of the following statements about EAC is correct?
Select one
Variance Analysis is an important tool used in the Control Costs process. Which of the following statements regarding variances is correct?
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Rick, a project manager, is updating the status of his project. Based on the performance indices, he expects the project to finish a month earlier than the planned finish date. However, he expects the project to exceed the budgeted costs. What can you say about the schedule performance index (SPI) of the project?
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The Actual Cost (AC) is the total cost actually incurred and recorded in accomplishing work performed for an activity or work breakdown structure component. What is the upper limit for the AC?
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As part of the Estimate Costs process, a project manager obtained access to certain commercially available databases to get resource cost rate information. Such published commercial information is considered what type of input?
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