Chomsky Normal Form (4 points) 4. prispelige der Consider the following grammar 5A Ah BAAR BAC Ariswer the Tullowing questions based on the grammar above 1. Which of the following variables are nellable B 2. After removing the nulable/epsion productions, which of the following grammars can be derived Sala 4 +DASDDAM BAH 0 Sala AABAALS BABU 5 + A A+ bc|BAA SBBAAA BABE None of the above 3. After removing the epsilon productions and then the unit productions, which one of the following grammars can be derived? ? O S + Aala Abc BAAAx|6B|6|BA|A4 Dabc BAADA Sala Abel BAANBAAA BBAAABAAA O SA A + BAAABAAA BBAAA66BAAA None of the above 4. Which of the following productions are already in NF? (The capital and small letters are non-terminals and terminals respectively 5 +ABO DXBB 0x ba