, Given:, a₁ = -4, a₅ = 8, Common Difference:, d = (a₅ - a₁) / (5-1), d = 8 - (-4) / 4, d = 12 / 4, d = 3, Arithmetic Means:, a₂ = a₁ + d, a₂ = -4 + 3, a₃ = a₁ + 2d, a₃ = -4 + 2 (3), a₄ = a₁ + 3d, a₄ = -4 + 3 (3), Thus, the 3 arithmetic means between -4 and 8 are , , The arithmetic means between -4 and 8 are, -1, +2 and 5