Question: Java Postfix calculator program that reads in lines of expressions without parenthesis from an input file. Program does exponentiation,negation,square root,addition,subtraction,multiplication,division with the stack data stucture.

Java Postfix calculator program that reads in lines of expressions without parenthesis from an input file. Program does exponentiation,negation,square root,addition,subtraction,multiplication,division with the stack data stucture. This program will be able to read in a file and produce an answer for each expression line in the input file.

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4. Explain the strengths and weaknesses of each approach.

d. Describe any challenges in trying to communicate. If there were no challenges, explain why you think it was so easy.

3. Identify the methods used within each of the three approaches.