One potential criticism of the obvious solution to the previous problem is that the values in internal

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One potential criticism of the obvious solution to the previous problem is that the values in internal nodes of the parse tree do not reflect the value, in context, of the fringe below them. Create an alternative solution that addresses this criticism. More specifically, create your grammar in such a way that the val of an internal node is the sum of the vals of its children. Illustrate your solution by drawing the parse tree and attribute flow for 12.34.

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