Question: 4.41 Extend your work for exercise 4.40 to include supplies that Heather uses on a project. Assume that she wants to track the description, price,

4.41 Extend your work for exercise 4.40 to include supplies that Heather uses on a project. Assume that she wants to track the description, price, and amount used of each supply. Supplies are used on multiple days of a project. Use the IE Crows Foot E-R model for your E-R diagrams.

4.42 Using recursive relationships, as appropriate, develop a data model of the boxcars on a railway train. Use the IE Crows Foot E-R model for your E-R diagrams.

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