Question Reference: Â Refer to Chapter 2 Exercise 2.90 to modify the method setRefNumber() such that it only accepts the reference as an input if it is at least 3 characters long. Otherwise, an error message will be shown and field will not be changed.

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Chapter 2, Problem 90E

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Question Reference:Â Refer to Chapter 2 Exercise 2.90 to modify the method setRefNumber() such that it only accepts the reference as an input if it is at least 3 characters long. Otherwise, an error message will be shown and field will not be changed.

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