You are a highly regarded project manager at your company. You have demonstrated the ability to execute and deliver results. You are working on a critical project that has the attention of the CEO. Your project team consists of 25-30 team members where you meet weekly. During a weekly meeting, you learn a team member, Jeff, is withholding information from other team members. Jeff proceeds to throw a tantrum during the meeting and accuses you of misrepresenting his work and taking credit for the work he's done. What steps should you take as the project manager and why?