The velocity vector v1 has a magnitude of 4.0 m/s and is directed along the +x-axis. the velocity vector v2 has a magnitude of 3.0 m/s. the sum of the two is v3, so that v3 = v1+v2. which of the following are true: a. the magnitude of v3 can be 7.0 m/s. b. the magnitude of v3 can be -5.0 m/s. c. the magnitude of v3 can be 3.0 m/s. d. the magnitude of v3 can be 0.0. e. the x-component of v3 can be 4.0 m/s. f. the magnitude of v3 can be 8.0 m/s