A block (3.4 kg) is on a level floor that has friction. A cord is attached to one side of the block, and a tension force is applied with a magnitude of 15.0 N at an angle of 20 degrees above the horizontal. The tension causes the block to accelerate to the right across the floor. There is a constant kinetic friction force of 4.5 N that opposes that motion. A) Find the acceleration of the block using Newton's Second Law of Motion. B) Suppose the same block is placed on the same surface (same friction force), but that surface is now on a 30-degree incline. Find the rate of acceleration of the block as it slides down the incline.