4. The effect of the following SQL instruction on the PROJECT table, when the only known Dnum instances in the DEPARTMENT table are 1, 4 and 5 is INSERT INTO PROJECT VALUES (Finance', 30, 'Windsor', 2); a. Insert an additional tuple in the PROJECT table with values specified. b. Update the second tuple of the PROJECT table to have the values specified. c. Raise an exception to indicate that there is a referential integrity violation. d. Raise an exception to indicate that there is a primary key constraint violation. e. None of the above 5. A basic SQL retrieval query to get all PROJECT name and its department name is: a. Select * where Plocation = 'Sugarland'; b. Select peame, doame from PROJECT; c. Select pname, dname from PROJECT, DEPARTMENT; d. All of the above e. None of the above 6. To retrieve the number of PROJECTs handled by each Dnum in the table PROJECT, we can use the query: a. Select Dnum, count(*) from PROJECT group by Dnum; b. Select min(*) from PROJECT group by Dnum; Select Dnum, sum(*) from PROJECT group by Dnum: d. Select max(*) from PROJECT group by Dnum; None of the above c. e