Q$1.$ Describe the relationships $($identify the business rules$)$ depicted in the Crow$$s Foot ERD shown in

FigureP$2\mathrm{.}13.$

Q$2.$ Create a Crow$$s Foot ERD to include the following business rules for the ProdCo company: a$.$ Each

sales representative writes many invoices. b$.$ Each invoice is written by one sales representative. c$.$ Each

sales representative is assigned to one department. d$.$ Each department has many sales representatives.

e$.$ Each customer can generate many invoices. f$.$ Each invoice is generated by one customer.

Q$3.$ Write the business rules that are reflected in the ERD shown in Figure P$2\mathrm{.}15.($Note that the ERD

reflects some simplifying assumptions. For example, each book is written by only one author. Also,

remember that the ERD is always read from the $1$ to the $$M$$ side, regardless of the orientation of the

ERD components.$)$