Explain in detail based on the NLP Transformer for 'Text to Text summarization' for below questions?

a$.$ Explain details about review of NLP Summarization Literature include examples?

b$.$ Explain details about Categorization and Comparison include examples?

c$.$ Explain details about Evolution of NLP Summarization Techniques with examples?

d$.$ Explain details about Comparative Analysis with examples?

e$.$ Explain details about Integration with Other NLP Tasks with examples?

f$.$ Explain details about Recent Trends and Innovations with examples?

g$.$ Explain details about Identification of Research Gaps with example?

h$.$ Explain details about Critical Evaluation with examples?

i$.$ Example details about Transition to Methodology Section?