A Weston Differential Pulley Block has two pulleys with a diameter of 100mm and 200mm. Tests have been carried out on the system to assist with the evaluation of the differential lifting machine, as shown in Table 1. The tests involved measuring the required effort for several known loads. Load (N) Effort (N) M.A. Table 1 - Load Test Results 36 72 28.8 38.4 150 57.6 216 74.4 282 91.2 330 103.2 Efficiency (%) Analyse the following aspects of the system: a) Determine the velocity ratio for the differential pulley b) Evaluate the results presented in Table 1 and complete the table to show mechanical advantage and efficiency. c) Using graph paper or appropriate software, plot a graph to show Load vs. Effort. Evaluate the straight line graph and determine the law for this differential pulley, expressing your answer in terms of E=aL+b to show the gradient and the intercept. d) Using graph paper or appropriate software, plot a graph to show Load vs. Efficiency. e) Evaluate the above graphs to determine the effort that is required when your client lifts a product f) that has a mass of 28.05 kg and the efficiency of the machine under that loading state.