data fw06p02; title 'Chapter 6, Exercise 2 ';
input  COLOR $   TIME ;
cards;
  red        9
  red       11
  red       10
  red        9
  red       15
  green     20
  green     21
  green     23
  green     17
  green     30
  black      6
  black      5
  black      8
  black     14
  black      7