Eliminate Λ-productions from the following context-free grammar: S → ASB|AB|ab A → AS|a|Λ B → SB|A|b

Eliminate unit productions from the following context-free grammar: S → B|SB|ab A → a|SA B → A|SB|b

Transform the following grammar into CNF (Chomsky normal form): S → AbBaS|ASB|AB|ab A → bB|a B → SBb|b