As part of a survey, 14 adults were asked, "How many hours did you spend at your job last week?" The results are shown in the stem-and-leaf display below. Use the display to answer the questions that follow. Number of hours worked last week 3 1249 1 146779 5 036 Key: 219 means 29 hours. (a) What was the highest number of hours worked overall? (b) What was the highest number of hours worked in the 30s? (c) How many responses fell in the 20s