How long should it take an average person to learn a language?

What is the predicate noun in the following sentence? my favorite flower is the rose.

Analyze how jackson uses elements of a story to develop her message. for example, how does she create both certainty about charles' character and uncertainty in her audience about charles' identity? should laurie's parents have realized the truth earlier? how does jackson foreshadow the ending for her audience, while allowing for a surprise for laurie's parents? what is jackson's message about children and parents?

Missense, nonsense, and silent mutations are examples of which type of mutation?