(('Problem Set #1' '09/11/2007') ('Problem Set #2' '09/18/2007') ('Problem Set #3' '09/25/2007') ('Problem Set #4' '10/02/2007') ('Problem Set #5' '10/18/2007') ('Problem Set # 6' '10/30/2007') ('Problem Set #7' '11/06/2007') ('Problem Set #8' '11/20/2007') ('Problem Set #9' '11/27/2007') ('Problem Set #10' '12/04/2007'))