The grammar below generates nested lists of numbers. The semantic actions are intended to count the number of elements just inside each parenthesized list. For each list found by Rule 2, Marker 44 prints out the number of elements found just inside the list. For example, the input (a) The grammar uses a global variable count to determine the number of elements in a list. What is wrong with that approach? (b) Change the semantic actions so that the appropriate values are synthesized