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3/ Outline the major motivation of IBM in developing PL/I. 4/ Write a BNF description of the Boolean expressions of Java, including the three operators

3/ Outline the major motivation of IBM in developing PL/I.

4/ Write a BNF description of the Boolean expressions of Java, including the three operators &&, ||, and ! and the relational expressions.

5/ Some programming languages have static variables. What are the obvious advantages and disadvanta

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