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Figure 2. The required window.
When the window is loaded, display a list of all categories and instructors in the two ComboBoxes labeled 1 and 2 (see Figure 2), respectively. By default, the first category is selected (see Figure 3).
Data Science
Data Science
Machine Learning
Web Development Artificial Intelligence
Cybersecurity
Cloud Computing
Software Engineering
Figure 3. ComboBox labeled as 1 displays a list of all categories.
Instructor
Dr. Smith
Prof. Johnson
Dr. Lee
Prof. Patel
Dr. Garcia
Prof. Kim
Dr. Davis
Figure 4. ComboBox labeled as 2 displays a list of all instructors.
Display a list of all courses belonging to the first category.
When the user changes the colected category the course list will also change accordingly
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