4. Write an attribute grammar for the floating point value of a decimal number given by the following grammar. (Hint: Use a count attribute to count the number of digits,, in addition to the val attribute) dnum →num.num num → num digit | digit digit → 01|2|3|4|5|6|78|9 4-1. Draw dependency graphs corresponding to each grammar rule for the attribute grammar 4-2. Draw a dependency graph for the declaration 362.54.

Given the context-free grammarS -> aB | bAA -> aS | bAA | aB -> bS | aBB | b Construct a PDA that simulates the grammar, that is, the rules of the grammar must be part of the machine (left most derivation always done).

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