### Question

In the context of this exercise, can we have more than two side by side bars for the bar chart?

### Answer

Yes, you can set any number of bars side by side for the bar chart. To do this, you can utilize the provided `create_x()`

function, which will return the x values for each group of bars.

For the `create_x()`

function, two parameters will be of importance. The `t`

parameter determines how many sets of data there are, and the `n`

parameter determines which set of bars the current data is for.

To add, for example, a third set of bars to this graph, we can do the following.

```
# First create the datasets
middle_school_a = [80, 85, 84, 83, 86]
middle_school_b = [73, 78, 77, 82, 86]
middle_school_c = [80, 85, 87, 92, 90]
# Create the x values for each using the create_x() function.
# Set t = 3 for the three sets of data.
school_a_x = create_x(3, 0.8, 1, 5)
school_b_x = create_x(3, 0.8, 2, 5)
school_c_x = create_x(3, 0.8, 3, 5)
# Plot the three sets of bars.
plt.bar(school_a_x, middle_school_a)
plt.bar(school_b_x, middle_school_b)
plt.bar(school_c_x, middle_school_c)
# You can also set the x positions for each x label,
# taking the average of the three x values.
middle_x = [ (a + b + c) / 3.0 for a, b, c in zip(school_a_x, school_b_x, school_c_x)]
ax.set_xticks(middle_x)
```