A mass 4kg is on a frictionless incline with inclination angle 15 degrees. An external force, acting at an angle of 30 degrees relative to the incline, pulls the force with a force of magnitude 8 Newtons. Find the magnitude and direction of the normal force, and also the value of the mass' acceleration. Verify your result with a force diagram, using graphical addition of vectors. As a reminder, for your graphical addition of vectors, the sum of all the forces acting on the mass should give you mass*acceleration. If the force is pulling on the mass, remember that it cannot pull so much that the normal force becomes zero.