Using the Crow's Foot notation, create an Entity Relationship Diagram $($ERD$)$ that can be implemented for a medical clinic using the following business rules:

a$.$ Patients are identified by their SSN$,$ and we also store their names and age.

b$.$ Each patient has one or several phone numbers stored in the database.

c$.$ Some patients in this clinic may not have any insurance.

d$.$ Some patients have one or two insurance policy $($identified by Insurance lD$).$ Each insurance policy has a start date. The insurance may be associated with several patients $($such as for spouses, children$).$

e$.$ Doctors are identified by their SSN$.$ and we also store their names and specialty.

f$.$ Each patient has one primary care doctor. and we want to know the start date that the patient has been with her primary care Doctor. g$.$ Each doctor has at least one patient. Specify key attributes of each entity type and specify all the constraints $($mandatory or optional participation. I$-$to$-$many, I$-$to$-$I, many$-$to$-$many$)$ on each relationship type.