w a parse tree for the string ddadddd using buttom-up and Top-down methods with the Context-Free Grammar below: Q → dQbb | F F → aF | ε 2. What is the problem with a grammar that generates two different parse trees? Give an example.  3. Differentiate between top-down and bottom-up parsing methods using a typical grammar.  4. Write a regular expression to describe inputs over the alphabet {a, b, c}  i) that are in sorted order  ii) containing at least one a and at least one b 5. Construct the NFA that will accept the string of (dc|ac)* dc (g

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