As part of a survey, 18 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 2 12 3 1123577 402344 5 2267 Key: 211 means 21 hours. (a) What was the least number of hours worked overall? (b) What was the least number of hours worked in the 30s? (c) How many responses fell in the 40s? X G