Question: Write Context free grammars (CFGs) for the following languages., and give at least two parse trees for legal strings (in each language) a. a n

Write Context free grammars (CFGs) for the following languages., and give at least two parse trees for legal strings (in each language)

a. anbman n, m >= 0

b. wcccwR w in (a|b|*

c. matching nested parentheses, that is (), ()()(), (())(), etc.

d. array reference: id[id,id,id,id] // at least one id inside [], can be more separated by commas

e. Which of the above languages have regular expressions? Explain

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