Question #1. Design a database to help a chemical engineering organization keep track of the assignment of equipment and employees to projects. The organization has several employees who work on one or more projects. Employees also may use certain kinds of equipment on each project. Attributes of EMPLOYEE include EmployeeID (identifier), EmployeeName, and PhoneNumber. Attributes of PROJECT include projectID (identifier), ProjectName and StartDate. Attributes of EQUIPMENT include SerialNumber (identifier) EquipmentType, and cost.

The organization wishes to record the AssignDate that is the date when a given equipment item was assigned to a particular employee working on a specified project. The organization also wants to keep track of the ReleaseDate the date when a given equipment item was released from an employee working on a specified project.

An employee must be assigned to at least one project. An employee may be assigned to multiple projects. An employee may or may not be assigned to an item of equipment. A given equipment item need not be assigned to a project or to an employee. A given project need not be assigned either an employee or an equipment item. A given equipment item can only be assigned to one project at a time. A given equipment item can only be assigned to one employee at a time. The organization wants to be able to assign an employee to a project, even if there is no item of equipment to assign. The organization also wants to be able to assign an item of equipment to a project, even if there is no employee to assign.