Part I: Long-answer. 1. We define a standard coordinate system, such that the +x-axis is right (-x-axis is left), +y-axis is up (-y- axis is down) and +z-axis is out (-z-axis is in). Answer the following questions with a sketch containing the velocity vector, the magnetic-field vector and the magnetic force vector. a. A +q is moving in the +x-direction, a B-field is b. A +q is at rest, a B-field is in the -z-direction, in the +y-direction, what is the direction of the what is the direction of the magnetic force? magnetic force? C. A -q is moving in the -y-direction, a B-field is d. A -q is moving in the -z-direction, a B-field is in the +z-direction, what is the direction of the in the +z-direction, what is the direction of the magnetic force? magnetic force? e. A B-field is in the +y-direction, the magnetic force on a charged particle is in the -x-direction, what is the direction the charge is moving, and what is the positivity of the charge