A box with a mass of 7.00 kg is at rest on a ramp that is at an angle of 20 degrees with the horizontal. The coefficient of static friction between the box and the ramp is 0.800. Use g = 9.80 m/s². You now want to make the box move by applying a force. To start the box moving, what is the minimum force you need to apply if your force is directed
a. parallel to the slope?