а. Екриь(М) b. M| H(K|M) с. М| Н(М) d. Ex(M | H(Kм) e. Екриь(М) | Екрri(H(M))

Could you lend me a hand with this question? I'm having trouble figuring it out, and my attempts so far have led to incorrect answers. I'm seeking guidance on how to approach the problem correctly, particularly for question 2.5. I understand that addressing part B of question 2.4 is crucial for solving 2.5. If possible, could you use visual aids or provide step-by-step explanations to help me grasp the solution better? Your assistance in guiding me through this would be highly valued.I only need help with question 2.5 but you need 2.4 part A to answer 2.5 but I only need help with 2.5. I have attach my answer but I don't know why it is incorrect.here is the question that i need help with:2.5 Give informal descriptions and state diagrams of pushdown automata for the languages in Exercise 2.4.2.4 Give context-free grammars that generate the following languages. In all parts, the alphabet Σ is {0,1}. a. {w | w contains at least three 1s}

Could you explain the "principle of non-repudiation"?

To what end have we used Google?