13. A block of mass m rests on an air table (no friction), and is pulled with a force probe, producing the Force vs. Acceleration graph shown below. Force vs. Acc 10- Force (N) 6- 0.0 20 acceleration (m/s2) 13a. Using Newton's Second Law (N2L) and the slope of the graph determine the mass of the block.The same block is now placed on a rough surface. 13b. Draw a coordinate axis frame and FreeBody Diagram for the block as it is being pushed across the horizontal surface. (Hint: Make sure you align this first coordinate axis [call itx and y] frame with the greatest number of initial forces.) D 13c. What is the minimum value of an applied force, Elm, (magnitude and direction), which will cause the block to just begin to move? 13d. After the block begins to move, the same applied force determined in part [14c} continues to act on the block. What is the acceleration of the block along the rough horizontal surface