3. A block of mass m=5kg is pushed a distance d=2.2m up along the =30 frictionless incline, horizontal by a constant applied force of magnitude /160N directed at an angle =45 below the horizontal as shown in the figure, Determine the work done on the block by (a) the the horizontal force, (b) the gravitational force on the block during this displacement, (c) the normal force, and (d) What is the speed of the block (assume that it is zero initially) after this displacement