The unemployment rates in a certain region for the years 1986dash2006 are shown in the graph. Find the average change per year in unemployment for the time periods in parts (a) through (c). 1986 1990 1994 1998 2002 2006 0 2 4 6 8 10 12 Year Unemployment rate, % 6.9 6.3 5.9 5.6 6.9 7.1 6.4 6.5 9.7 8.8 7.9 A coordinate system has a horizontal x-axis titled Year, labeled from 1986 to 2006 in increments of 4 and a vertical y-axis titled Unemployment rate, %, labeled from 0 to 12 in increments of 1. The graph consists of 21 plotted points connected by line segments from left to right. The coordinates of the plotted points are at (1986, 6.9), (1987, 6.4), (1988, 6.3), (1989, 6.1), (1990, 5.9), (1991, 5.7), (1992, 5.6), (1993, 5.8), (1994, 6.9), (1995, 7.2), (1996, 7.1), (1997, 6.8), (1998, 6.4), (1999, 6.3), (2000, 6.5), (2001, 8.3), (2002, 9.7), (2003, 9.3), (2004, 8.8), (2005, 8.4), (2006, 7.9). Question content area bottom Part 1 (a) 1986 to 1992 The average change per year in unemployment from 1986 to 1992 is enter your response here. (Round to two decimal places as needed.) Part 2 (b) 1992 to 1998