SOLVED:Homework 2

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Problem 1 out of 3. Consider the following grammar 1. Calculate the FIRST sets for all non-‐terminals. See chart below. 2. Calculate the FOLLOW sets for all non-‐terminals. See chart below.
NOTE: FIRST(E) = { en,(m),u, … depicts this element of the FIRST sets was the nth symbol added to a set, derived using grammar rule m, having FIRST (or FOLLOW) set rule u being applied.Problem 2 of 3. Consider a grammar that has the following rule A → B C D E And we are told that D is the start symbol. Also, we know that FIRST(B) ⊇ { b } FIRST(C) ⊇ {ε, b} FIRST(E) ⊇ {ε, e, d} 1. From what you is given, which elements are definitely in FIRST(A)?2. Is it true that for this grammar FIRST(A) ⊇ FIRST(B) . Explain. 3.Adding which grammar rule ensures that FOLLOW(A) = FOLLOW(D)? Explain
Problem 3 of 3. Consider the grammar S → A B C | C A → a A | B | ε B → c B | d | ε C → e C | f Show that this grammar has a predictive parser by showing that it satisfies the conditions for predictive parsing.
1. Write the function parse_A() to parse the non-terminal A.
• Assume you have functions to parse all other non‐terminals. • You can assume that you have a function getToken() to read the next token in the input. • You can assume that you have the following token types to use in your code: a-type, btype, c-type, d-type, e-type, f-type , and EOF.

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