Urgent biology question

Scientists have found the mean length of time spent by onion cells in anaphase of mitosis is 105 minutes. They also found the cell cycle of cells in the onion root shown in Figure 2 takes 1080 minutes.
32 whole cells are shown in Figure 2.
Use this information and Figure 2 to calculate the length of time the cells of this onion root are in anaphase and then calculate the percentage difference between your answer and the mean length of time found by the scientists.
Figure 2 shows the cells the student saw in one field of view. He used this field of view to calculate the length of time these onion cells spent in anaphase of mitosis.
https://filestore.aqa.org.uk/sample-...2-QP-JUN18.PDF

QUESTION 5.2

3 cells are in anaphase so 3 / 32 = 0.09375 this tells you the proportion of time spent on anaphase.
0.09375 * 1080 = 101.25 minutes for anaphase to take place.
105 - 101.25 = 3.75
(3.75 / 105) * 100 = 3.57% difference to mean time found by scientists.