The stem-and-leaf display below gives the amounts of money (In dollars) spent by the Roberts family in their last 17 trips to an amusement park. Use the display to answer the questions that follow. Amount spent at the amusement park (dollars) 21 017 22 258999 23 14899 24 189 Key: 21 0 means 210 dollars spent (a) What was the least amount spent in the 220s? (b) what was the highest amount spent overall? (c) How many amounts fell in the 230s