3. For the relation T1(A1,B1,C1) which following physical database design method can be used to restrict user access on either A1 and B1 or A1 and C1, exclusively? A) Horizontal partitioning B) Vertical partitioning C) Both Horizontal and Vertical partitioning 4. For the table Employee (EMPID, EmpName, EmpType, EmpSalary), which following physical database design method can be used to restrict user access of rows in the table based on the value of EmpType Exclusively? A) Horizontal partitioning B) Vertical partitioning C) Both Horizontal and Vertical partitioning