Question: 2. Consider the context-free grammar: S->S SIS-S|(S)|a 1) Use left-most and right-most derivation to show how the string (a- a)*a can be generated by

2. Consider the context-free grammar: S->S SIS-S|(S)|a 1) Use left-most and right-most derivation to show how the string (a- a)*a can be generated by this grammar. 2) Construct a parse tree for this string. 3) Is this grammar ambiguous? Why? (Hint: consider parse tree for a*a*a)

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