6.Evaluate the line integral with = [5z, xy, x²z] = 5. Along two different paths with the same initial point A: (0, 0, 0) and the same terminal point B: (1, 1, 1), namely (Fig. 2)
(a)C₁: the straight-line segment , 0 ≤ t ≤ 1. (8 分)