Question: Regarding LR parsing algorithm. a ) Explain the reason why a handle always on top of the stack. b ) Explain the reason why the

Regarding LR parsing algorithm.
a) Explain the reason why a handle always on top of the stack.
b) Explain the reason why the prefix in stack is always viable.
c) Explain the reason why LR may see more input and thus become more powerful than LL.
d) Compare the power and efficiency in detecting syntax errors for SLR, LALR and Canonical LR
parsers

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