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701: Practice

An instance of MultipleSelectListBox responds to the selection message with the index of the first item selected; it responds to the selections message with an ordered collection of the indexes selected. Alter the definition of createViews shown in Segment 692 such that createViews creates a MultipleSelectionListBox instance. Then, alter the definition of itemSelected such that the answers produced by both the selection and the selections messages are displayed whenever an item is selected.