using the diagram need help to slove question 2 3 4 to show work to understand

thank you

The double-reduction helical gearset shown in the figure above is driven through shaft a at a speed of 1200rev/min. Gears 2 and 3 have a normal diametral pitch of 12 teeth/in, a 30 helix angle, and a normal pressure angle of 20. The second pair of gears in the train, gears 4 and 5 , have a normal diametral pitch of 6 teeth/in, a 25 helix angle, and a normal pressure angle of 20. The tooth numbers are: N2= 14,N3=54,N4=16,N5=36. Find: Question \#2 If the gearset in question \#1 is to transmit 20HP,a being the input shaft and shaft C being the output shaft. a) What is the type of the gear train shown in figure? b) Compute the tangential and radial forces acting on each of the gears 2,3 and 4. Question \#3 Find a suitable diameter of each of the shafts a,b, and c (in figure of question \#1) if the material of the shafts has a yield stress equal to 60103 psi. Make any necessary assumption. Question \#4 For the forces computed in question #2 and design life of 3000 hours. 1) Compute the design load and 2) Compute the rating load of the bearings. (Take rating life equal to 106 load cycles)