What SQL command(s) would you use to add the date on which an employee was hired to the EMPLOYEE table represented in Figure? Name this new attribute Employment_ Date. Assume that the employees were hired on the following dates, using a year- month- day format as YYYYMMDD:

• Carl Elks 20000522
• Janet Robins 20010103
• Greg Kinman 19970825
• Christy Bazie 20040801
• Elaine Kopp 20060912
• John Mast 19950709