Why don’t issues of associativity and precedence arise in Postscript or Forth? What does it mean for an expression to be referentially transparent? 6. What is the difference between a value model of...

Why don’t issues of associativity and precedence arise in Postscript or Forth? What does it mean for an expression to be referentially transparent? 6. What is the difference between a value model of variables and a reference model of variables? Why is the distinction important? What is an l-value? An r-value?