d S e evra la pre ve or we U PR GH (7 pts) AWA ROIT D'A OTTAWA TERIAL In the two-stage planetary gear train shown in the figure below, internal ring gear 6 is fixed and crank arms C and D are attached to the output shaft. Internal ring gears 3 and external ring gear 4 form a compound wheel that rotates freely about the output shaft. The input is driven by an 18-kW motor at n = 3,000 rpm clockwise. N = 20, N3= 72, N4 = 24, 6 = 64. Problem 2: a) Question 8) Show that N= 26 and N = 20. Question 9) Suppose (only in this question) that crank arms C and D and the output shaft are fixed and internal ring gear 6 is free to rotate. Find the train value for the ordinary gear train (1,2,3,4,5,6). Question 10) Consider the real system, where crank arms C and D are attached to the output shaft and internal ring gear 6 is fixed. Identify the input, output Fixed and arm referred to in e = no-n n-na for the real system and find the speed of the output shaft. Input adre de mat ion Question 11) Assuming that the gear reducer operates at 100% efficiency, what is the output torque? LVI b) Explain your problem-solving approach and solution steps in a paragraph. ed by ssion (3 pts) ca Output