Find a . b. a = 4i + j, b = i - 5j + k 24 XFind a . b. lal = 5, [b| = v6, the angle between a and b is 450 3 XFind, correct to the nearest degree, the three angles of the triangle with the given vertices. A(1, 0), B(5, 4), C(-1, 5), ZCAB = LABC = LBCA = OFind the work done by a force F = 4i - 8j + 7k that moves an object from the point (0, 8, 4) to the point (6, 14, 18) along a straight line. The distance is measured in meters and the force in newtons. 144 X ]