computer science

 Modify DepartmentSalesS project posted on Blackboard as “Observer Pattern Example – Chart Using Swing” Add an Observer to display monthly sales in a pie chart. You modify so it will display a pie chart. Modify to add a PieChart observer and change Layout so it has three columns. Follow the link to see how to draw pie chart as multiple pies. You may use a Color array like Color[] colors= {,Color.yellow, Color.gray,, Color.cyan,,Color.magenta,,, Color.darkGray,, Color.lightGray}; Before you draw the pie piece for a month i, you set color like g.setColor(colors[i]); 2. Modify ChartS posted on Blackboard as “Observer Pattern Example – Chart Using Swing” Add a PieChart to display monthly sales You may follow the following website: Create array of PieChart.Data using a loop. Add one a time to PieChart using a loop. To display the tip of %, you may follow the following website 

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