Write a program called BarChart.java that uses a bar chart to display the percentages of the overall grade represented by projects, quizzes, midterm exams, and the final exam, as shown below. Suppose projects take $20\%$ and are displayed in red, quizzes take $10\%$ and are displayed in blue, midterm exams take $30\%$ and are displayed in green, and the final exam takes $40\%$ and is displayed in orange. Use the Rectangle class to display the bars. Interested readers may explore the JavaFX BarChart class for further study.