• In this lab, we will use our previously developed stack implementation to create a reverse Polish notation calculator.
• Download the provided code.
• Unpack the code into the existing Eclipse Java project from Labs 5 and 6.
• The code includes the following files:
  • rpn package
    • Calculator.java: Run this program to operate the stack-based calculator. You'll be able to see both the current result and all of the stack contents.
  • rpn.model package
    • RPNCalc.java: This is the only file you will modify for this assignment. You will use a stack of integers to implement the RPN calculator. You are free to use either implementation from the previous labs.
    • RPNCalcTest.java: These are the unit tests for your calculator. Your grade depends on the results of the unit tests for your RPNCalc implementation.

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