please answer question 3, 4 and 1, 2. Answers should be short. it doesn't have to be very long

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3. Have you ever worked in a virtual team? If so, what were the challenges and advantages of working virtually? 4. How large do you think teams should be and why? 13.4 Organizing Effective Teams 1. Have the norms for most of the teams you have belonged to been formal or informal? How do you think that has affected these teams? 2. Have you ever been involved in creating a team contract? Explain how you think that may have influenced how the team functioned