Suppose we have a 20 lb box sitting on an 8 ft ramp at an incline of radians. (a) Sketch a diagram showing a vector representing the ramp, a vector representing the force of gravity acting directly on the box, and a vector representing the force of gravity that is acting on the box parallel to the ramp. (b) Compute the components of the force of gravity that is acting on the box parallel to the ramp. Update your sketch if needed. (c) How much force is required to prevent the box from sliding down the ramp?