What is the correlation coefficient between Irwin's sales and costs and between sales and GNP growth?

2. What is the correlation coefficient between Irwin's sales and costs and between sales and GNP growth? Year GNP growth Sales Costs 1990 2.0% $105,400 $71,000 1991 1.5 101,900 72,200 1992 -2.0 100,400 72,300 1993 -1.0 102,200 72,500 1994 0.5 104,000 72,000 1995 -1.0 99,950 71,300 1996 1.0 103,300 72,300 1997 2.0 102,800 72,100 1998 2.5 104,900 72,300 1999 0.0 100,100 72,500 2000 2.0 104,600 71,200 2001 1.5 102,000 71,730 2002 3.0 103,300 70,600