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Consider entity type Employee with attributes empNumber (this is unique), empName, and the year when he/she was hired. An employee can either be a technical employee, a marketing employee, or a business executive. For a technical employee, we know his/her undergraduate degree major. For a marketing employee, we know the revenue generated by this employee to date. For a business executive, we know the number of years of experience.

Model the above using ER, translate the ER schema to SQL DDL. Include the ER schema, the SQL statements and appropriate screen shots showing that your CREATE TABLE statements succeeded into your submission document.

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