Please help! How long ago were the sculptural portraits of the first Yoruba kings made? What technique was used to make them?

This isn't school related, but i need , i'm typing a story and i want to open with an omniscient limited point of view, where a woman with ptsd is dreaming and the reader doesn't know it's a dream yet. you even have to give me an opening sentence, but an example from a book with an omniscient limited point of view would alot. if you don't know what i'm referring to. "definition of third person limited. in third person limited the narrator only knows the thoughts and feelings of one character. all characters are described using pronouns, such as 'they', 'he', and 'she'. but, one character is closely followed throughout the story, and it is typically a main character."

Who is depicted in the image below?

What are the colors that cannot be made by mixing other colors