Question: 1. Give unambiguous grammar for nested if-then-else structure. Using the same unambiguous grammar show how we can parse the following structure of if then else

1. Give unambiguous grammar for nested if-then-else structure. Using the same unambiguous grammar show how we can parse the following structure of if then else statement: if E1 then if E2 then S1 else S2 else S3.

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