UNF:
Employee	Age	Department
Melvin		32	Marketing, Sales
Edward		45	Quality Assurance
Alex		36	Human Resource

1NF:
Employee	Age	Department
Melvin		32	Marketing
Melvin		32	Sales
Edward		45	Quality Assurance
Alex		36	Human Resource


https://docs.microsoft.com/en-us/previous-versions/tn-archive/cc505842(v=technet.10)?redirectedfrom=MSDN
UNF:
Projects(ProjectId, ProjectName, CustomerId, CustomerName, Activities(Activity1Id, Activity1Name, ActivityNId, ActivityNName), Employees(Employee1Id, Employee1Name, EmployeeNId, EmployeeNName), WorkDate, TimeSpent)

Project (ProjectId*, CustomerId*@, ProjectName)
Customer (CustomerId*, CustomerName)
Activity (ActivityId*, ActivityName)
Employee (EmployeeId*, EmployeeName)
Employee_ProjectActivity (EmployeeId*@, ProjectId*@, ActivityId*@, WorkDate, TimeSpent)