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Consider the following relational algebra expressions, for each expression, explain ni words what the expression does. a. O attendance=> 75 (Student) b. IEName, Salary, Dept.

Consider the following relational algebra expressions, for each expression, explain ni words what the expression does. a. O attendance=> 75 (Student) b. IEName, Salary, Dept. Name (Employee) c. Emp_id (ODept_Id 5=(Employee)) Respective tables are as below: Student (Reg._No., Name, Attendance, Marks, Dept. _Name) Employee (EName, Emp_id, Salary, Dept._Id)

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