The following is a specification for a software unit. The unit computes the average of 25 floating point numbers that lie on or between bounding values which are positive values from 1.0 (lowest allowed boundary value) to 5000.0 (highest allowed boundary value). The bounding values and the numbers to average are inputs to the unit. The upper bound must be greater than the lower bound. If an invalid set of values is input for the boundaries an error message appears and the user is reprompted. If the boundary values are valid the unit computes the sum and the average of the numbers on and within the bounds. The average and sum are output by the unit, as well as the total number of inputs that lie within the boundaries.
Derive a set of equivalence classes for the averaging unit using the specification, and complement the classes using boundary value analysis. Be sure to identify valid and invalid classes. Design a set of test cases for the unit using your equivalence classes and boundary values. For each test case, specify the equivalence classes covered, input values, expected outputs, and test case identifier. Show in tabular form that you have covered all the classes and boundaries. Implement this module in Java. Run the module with your test cases and record the actual outputs.
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