New PMP Question & Answers with explanation

Which of the following is true regarding stakeholders and the project charter?
Select three
Which of the following is not true regarding the purpose of a business case?
Select one
Which of the following is true regarding IRR?
Select one
You are the project manager for Insomniacs International. Since you don't sleep much, you get a lot of project work done. You're considering recommending a project that costs $575,000; expected inflows are $25,000 per quarter for the first two years and then $75,000 per quarter thereafter. What is the payback period?
Select one
Which of the following is true regarding NPV?
Select one