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771: Practice

Use the Smalltalk Express GUI builder to implement an application that allows you to display growth in the population of rabbits as suggested by the following illustration:

Each time that the Remove Generation button is pressed, the number of generations is to decrease by 1. Each time that the Add Generation button is pressed, the number of generations is to increase by 1. You are to use the ChartGraphPane class and drawChart method that you defined in Segment 676.