Diana designs stained-glass windows. She has a large supply of square galss windw panes. Some panes are yellow, and some panes are red. She wants

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to create a stained-glass window that combines yellow and red panes in a specific pattern. However, she needs to know how many of each pane she has in order to plan her design effectively. To determine the number of yellow and red panes Diana has, she can follow these steps:

1. Start by gathering all of her square glass window panes in one place.
2. Sort the panes into two groups: yellow panes and red panes.
3. Count the number of panes in each group separately.
4. Once Diana knows the number of yellow and red panes she has, she can proceed with designing her stained-glass window. She can calculate the number of panes needed for each color in the pattern and ensure she has enough of each color to complete it.

By simply organizing and counting the different colored panes, Diana can determine how many of each she has and plan her stained-glass window design accordingly.