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User Management and Group Management

1. There are 3 players yuvraj, dhoni, gambhir. They will be playing in IPL5
2. IPL5 has 4 teams: kkr, rr, csk, dd
3. User yuvraj has the primary group as rr
4. Team kkr has primary user as dhoni and secondary user as gambhir
5. Team csk has primary user as gambhir and secondary user as yuvraj
6. Team dd has secondary user as dhoni
7. Create all the 3 users with the above conditions in your Linux server