The table shows the number of CD players sold in a small electronics store in the years 1993-2003. Year CD players sold 1993 512 1994 449 417 390 489 420 485 511 625 703 825 1995 1996 1997 1998 1999 2000 2001 2002 2003 (a) What was the average rate of change of sales between 1993 and 2003? units/yr (b) What was the average rate of change of sales between 1993 and 1994? units/yr (c) What was the average rate of change of sales between 1994 and 1996? units/yr (d) Between which two successive years did CD player sales increase most quickly? CD player sales increased most quickly between and Between which two successive years did CD player sales decrease most quickly? CD player sales decreased most quickly between and