What does the term cosmography mean in this context?

Answer each of the following prompts in two to three sentences each. Use the lectures and course materials; otherwise, cite any external sources.

1. What is the Yijing 易经?
1a. How do you translate the title? Identify and define the three different strata of the text as outlined in the course reading “Origins of the Yijing”.
2. What are the trigrams and hexagrams?
2A. What do they represent?
2B. What were they originally used for?
3. What does the term cosmography mean in this context?
4. What is the meaning and etymology of the terms: yin 陰and yang 陽?
5. How are yin and yang forces expressed in the symbolism (trigrams and hexagrams)?