A potential customer has described the following scenario to you:

We need to keep track of the data that our manufacturing firm needs to run smoothly.We make a number of products, each of which is manufactured by a different de-partment. Products are made up of a number of parts. Parts are bought fromsuppliers.You have been asked to perform a preliminary analysis of the scenario

:a) Identify four sets of values from the scenario.

b) Identifythreerelations from the scenario.

c) Draw anentity-relationship diagramto visualise the sets and relations you have identi-fied.

d) Use the relations you identified in part b) to define the following:i) A relation that records the parts that a department needs.

ii) A relation that records the suppliers that a department deals with.