Develop an E-R model (E-R Diagram) for the application belowDatabase RequirementsLogin

Information about the users of the system must be maintained. There will be 4 types of users with different privileges (admin, sales, HR, engineering). Each user will have the following fields

User ID
Privilege
LoginTime
LogoutTime
Engineering includes employee designing the product, manufacturing and all employee interested in tracking inventory.

Inventory
Id
Cost

Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]