Consider the gear train shown in the figure below. Input Fixed 5 2 6 4 P 3 Output Contacts between gears (4) and (5), and gears (6) and (7) count as internal contacts. The input speed is n1 = 6,000 rpm. Arm (2) is free to rotate and holds a shaft turning with gears (3), (4) and (6). N1 = 15, N3= 42, N4 = 33, N5 = 150, N6 = 32, N7 = 100. In questions 16) and 17), suppose that arm (2) is fixed and gear (5) is free to rotate. Find: Question 16) the train value 5 11 n en = for ordinary gear train (1,3,4,5), Question 17) the train value 72 1nen = for ordinary gear train (1,3,6,7). Consider now the real system, where arm (2) is free and gear (5) is fixed. Question 18) Identify,nL,nF and nA in e1=(nL-nA)/ (nF-nA) for planetary gear train (1,3,4,5), Question 19) find n2. Question 20) Identify,nL,nF and nA in e2=(nL-nA)/ (nF-nA) for planetary gear train (1,3,6,7), Question 21) find n7.