Three forces acting on an object are given by F = (-1.551 + 5.701) N, F2 = (4.551 - 1.8]) N, and F3 = (-421) N. The object experiences an acceleration of magnitude 3.85 m/s. (a) What is the direction of the acceleration? (counterclockwise from the +x-axis) (b) What is the mass of the object? kg (c) If the object is initially at rest, what is its speed after 19.0 s? m/s (d) What are the velocity components of the object after 19.0 s? (Let the velocity be denoted by v.) + i) m/s