The cumulative frequency table shows the height, in cm, of some tomato plants.
| Height | Cumulative Frequency |
|---|---|
| 140<h≤150140 < h \leq 150140<h≤150 | 7 |
| 140<h≤160140 < h \leq 160140<h≤160 | 17 |
| 140<h≤170140 < h \leq 170140<h≤170 | 32 |
| 140<h≤180140 < h \leq 180140<h≤180 | 51 |
| 140<h≤190140 < h \leq 190140<h≤190 | 57 |
| 140<h≤200140 < h \leq 200140<h≤200 | 60 |
a.[2]
On the grid, plot a cumulative frequency graph for this information.
b.[2]
Find the median height.