Draw the relationships that are described by the following business rules. Include the multiplicities for each relationship.

A patient must be assigned to only one doctor and a doctor can have one or many patients.

An employee has one phone extension, and a unique phone extension is assigned to an employee.

A movie theater shows at least one movie, and a movie can be shown at up to four other movie theaters around town.

A movie either has one star, two costars, or more than ten people starring together. A star must be in at least one movie.