New PMP Question & Answers with explanation

In a software development project, you are having joint application development (JAD) sessions to collect product requirements from stakeholders. Which of the following mandatory standards in the PMI Code of Ethics and Professional Conduct is met by having JAD sessions while gathering requirements?
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You have recently taken over a project from a PMP-certified project manager who was removed from the project due to incompetence and lack of skills. When you happen to meet him outside your building, he starts rebuking you for taking his project. He even goes so far as to suggest that your religion played a part in your selection by the management. What should you do first?
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What should you do as a senior project manager if the PMP certification claimed by a recently recruited project manager does not appear in the PMI website?
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While conducting interviews for a project manager position, you notice that your classmate is one of the prospective candidates. What should you do immediately?
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A company hires you to work as a project manager in a foreign country. You discover that you must pay kickbacks to the officials there to get licenses for your project. What should you do?
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