Consider the following two Relational Schema describing the EMPLOYEES and DEPARTMENTS of some organization (assume all names are unique). EMPLOYEES (EmployeeName, Salary, DeptName) DEPARTMENTS (DeptName, ManagerName, City) Assume that the CREATE TABLE statement for the EMPLOYEES table is already specified. Add to this declaration, an SQL constraint (check) which specifies that the 'Marketing' department has fewer than 250 employees, with an average salary higher than 75,000