The frequency table shows the heights, h h\,h cm, of 80 sunflower plants.
| Height (h h\,h cm) | Frequency |
|---|---|
| 0<h≤100 < h \leq 100<h≤10 | 8 |
| 10<h≤2010 < h \leq 2010<h≤20 | 14 |
| 20<h≤3020 < h \leq 3020<h≤30 | 26 |
| 30<h≤4030 < h \leq 4030<h≤40 | 20 |
| 40<h≤5040 < h \leq 5040<h≤50 | 12 |
Draw a frequency polygon to show this information.
