Living-donor kidney transplants are becoming more common. Often a living donor has chosen to donate a kidney to a relative with kidney disease. The following data appeared in a USA Today article on organ transplants (€œKindness Motivates Newest Kidney Donors,€ June 19, 2002):

a. Construct a time-series plot for the number of living- donor kidney transplants where the donor is a relative of the recipient. Describe the trend in this plot.
b. Use the data from 1994 and 2001 to construct a comparative bar chart for the type of donation (relative or unrelated). Write a few sentences commenting on your display.

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Number of Kidney Transplants Living-Donor to Relative Living-Donor to Unrelated Person Year 1994 1995 1996 1997 1998 1999 2000 2001 2390 2906 2916 3144 3324 3359 3679 3879 202 400 526 607 814 930 1325 1399