In the figure below, pinion 2 is to be a right-hand helical gear having a helix angle of 30◦, a normal pressure angle of 20◦, 18 teeth, and a normal diametral pitch of 8 teeth/in. A 20-hp motor drives shaft a at a speed of 1720 rev/min clockwise about the x axis. Gear 3 has 40 teeth. Find the reaction exerted by bearings C and D on shaft b. One of these bearings is to take both radial and thrust loads. This bearing should be selected so as to place the shaft in compression.