3. (7 points) A worker lifts various loads with the same lever. The distance of the applied force from the fulcrum is 3.5 m and the distance from the fulcrum to the load is 0.850 m. A graph of resistance force vs. effort force is shown. a. What is the mechanical advantage of the lever? Explain

b. What is the ideal mechanical advantage of the lever? Show your work

c. What is the efficiency of the lever? Show your work.