12. Consider Problem 4, Set 17.1a, dealing with patients suffering from kidney failure. Determine the following measures:

(a) TIle expected number of years a patient stays on dialysis.

(b) The longevity of a patient who starts on dialysis.

(c) The life expectancy of a patient who survives one year or longer after a transplant.

(d) The expected number of years before an at-Ieast-one-year transplant survivor goes back to dialysis or dies.

(e) The quality of life for those who survive a year or more after a transplant (presumably, spending fewer years on dialysis signifies better quality of life).