The distance travelled by 100 people to an event is summarised below.
| Distance (nearest mile) | Frequency |
|---|---|
| 0 – 9 | 4 |
| 10 – 14 | 19 |
| 15 – 18 | 41 |
| 19 – 20 | 26 |
| 21 – 25 | 9 |
A histogram was drawn and the bar representing the 10 – 14 class has a width of 3 cm and a height of 1.9 cm.
Find the width and height of the bar representing the 15 – 18 class.
Find the width and height of the bar representing the 19 – 20 class.
