Change the storyboards in Section 4.6 to support a menu that asks users whetherthey want
Chapter 4, Problem R4.19(choose chapter or problem)
Change the storyboards in Section 4.6 to support a menu that asks users whetherthey want to convert units, see program help, or quit the program. The menu shouldbe displayed at the beginning of the program, when a sequence of values has beenconverted, and when an error is displayed.
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