Normalize this table to the third normal formEmployeeID EmployeeName Department Skill1 Level1 Skill2 Level2 Skill3 Level31101 John Doe IT Python Expert SQL Advanced - -1102 Jane Smith HR Communication Advanced Management Expert - -1103 Mike Johnson IT Java Intermediate Python Advanced SQL Expert

To normalize the given table to the third normal form (3NF), we need to remove any transitive dependencies and ensure that every non-prime attribute is non-transitively dependent on every key of the table. Here are the steps:

1. First Normal Form (1NF): A table is in 1NF if it has an atomic value for each attribute in a row. The given table is not in 1NF because the attributes Skill and Level are multivalued. We can convert it to 1NF by creating a new row for each skill and its level for each employee.

   EmployeeID	EmployeeName	Department	Skill	Level
   1101	John Doe	IT	Python	Expert
   1101	John Doe	IT	SQL	Advanced
   1102	Jane Smith	HR	Communication	Advanced
   1102	Jane Smith	HR	Management	Expert
   1103	Mike Johnson	IT	Java	Intermediate
   1103	Mike Johnson	IT	Python	Advanced
   1103	Mike Johnson	IT	SQL	Expert

2. Second Normal Form (2NF): A table is in 2NF if it is in 1NF and every non-prime attribute is fully functionally dependent on the primary key. In our case, the primary key is EmployeeID and Skill. The table is already in 2NF because all non-prime attributes (EmployeeName, Department, Level) are fully functionally dependent on the primary key.

3. Third Normal Form (3NF): A table is in 3NF if it is in 2NF and there is no transitive dependency for non-prime attributes. In our table, the attribute Department is dependent on EmployeeID, not on the Skill, so we can say that there is a transitive dependency. To convert it to 3NF, we need to move the Department to a new table, using EmployeeID as the primary key.

   Table 1: Employee

   EmployeeID	EmployeeName	Department
   1101	John Doe	IT
   1102	Jane Smith	HR
   1103	Mike Johnson	IT

   Table 2: EmployeeSkills

   EmployeeID	Skill	Level
   1101	Python	Expert
   1101	SQL	Advanced
   1102	Communication	Advanced
   1102	Management	Expert
   1103	Java	Intermediate
   1103	Python	Advanced
   1103	SQL	Expert

Now, the tables are in 3NF.