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b. i) Draw the expression tree that corresponds to the following postfix expression: 4 19 7/+ 2 8 - ii) Find the prefix expressions

b. i) Draw the expression tree that corresponds to the following postfix expression: 4 19 7/+ 2 8 - ii) Find the prefix expressions expression: 4 6 2 5 + * 7 that is equivalent to the following postfix / 1 +

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