Use the following business rules to create an ERD which include all appropriate connectivities and cardinalities.
Also, specify the relational schema for the resulting ERD.
a) A department employs many employees, but each employee is employed by one department.
b) Some employees, known as “rovers,” are not assigned to any department.
c) A division operates many departments, but each department is operated by one division.
d) An employee may be assigned many projects, and a project may have many employees assigned to it.
e) A project must have at least one employee assigned to it.
f) One of the employees manages each department, and each department is managed by only one employee.
g) One of the employees runs each division, and each division is run by only one employee.