inquire - its grammar

  1. He inquired her name.
  2. He inquired about her name.
  3. He inquired of her name.
  4. She inquired about his age.
  5. She inquired of his age.
  6. I’ll inquire of my aunt when she is coming.
  7. I’ll inquire about my aunt when she is coming.
    Please correct and comment.
    Thanks

1. He inquired her name.
2. He inquired about her name.
3. He inquired of her name.
4. She inquired about his age.
5. She inquired of his age.
6. I’ll inquire of my aunt when she is coming.
7. I’ll inquire about when my aunt is coming.

Beeesneees,
I.

  1. I want to inquire of him about the price of Sony TV.
  2. I want to inquire of him the price of Sony TV.
  3. I want to inquire about the price of Sony TV.
  4. I want to inquire the price of Sony TV.
  5. I want to inquire the price of Sony TV from him.
    II.
  6. He inquired what time it was.
  7. He inquired of her what time it was.
  8. He inquired about what time it was.
    Please correct and comment.
    Thanks.

All set I need an indefinite article ‘a’ before ‘Sony’.