Below is a preliminary entity relationship $($ER$)$ data

model for a stationary sales database. Extend and

modify the ER data model using Crow's foot

notation; create appropriate identifiers and

attributes for each entity. Explain how you went

from first normal form $(1$NF$)$ to second normal form

$(2$NF$)$ and how you achieved third normal form

$(3$NF$).$ Lastly justify the decisions that you make

regarding minimum and maximum cardinality.