Draw an ERD diagram in UML and show all the relationships and cardinality constraints.

1. AIRTIGHT manufacturing company has full-time and part-time employees. All employees have employee-id, social security number, join date, and department. An employee is either a full-time or a part-time employee. Full-time employees have salary, insurance, and spouse id. Part time employees have hourly pay and contractor id. Draw an appropriate relationship diagram with all markers. Indicate the number of tables and the columns in each table.