The deviations from a mean of values from a set of data are -2, (m – 1), (m² + 1), -1, 2, (2m – 1) and -2. Find the possible values of m.

Explanation

Oral literature includes all verbal art passed down through speech: folktales, proverbs, riddles, songs, praise poetry, chants, myths, and legends. Performance (voice, gesture, audience interaction) is integral.

Functions: entertainment, education, moral instruction, historical preservation, social commentary, religious expression. Griots and traditional performers are community historians and entertainers.

Preservation challenges: fewer people learn from elders, electronic media competes, migration disrupts transmission. Recording, transcription, and incorporation in education help preserve oral heritage.