Explain how you used the bar model in exercise 2 to solve the problem Grandma has 14 red roses and 7 pink roses. How many more red roses than pink roses does she have

We are given that Grandma has 14 red roses and 7 pink roses.
In order to represent them on bar modal, we need to make a bar with 14 identical sections for 14 red roses.
And for pink roses, we need to make a bar with 7 identical sections for 7 pink roses.
From the bar graph, we can see that bar for red roses have 7 more boxes than bar of pink roses.
Therefore, she have 7 more red roses than pink roses.

Where is the problems