Design a spur speed reducer that will take power from the shaft of an electric motor rotating at 1200 rpm and deliver it to a machine that is to operate at approximately at 155 rpm. You are proposing to use a double-reduction speed reducer like the one shown in the sample figure 1. 1. Ali 2. Harvin 3. Bharath 4. Shivanesa 5. Palvin 4 Target Power 106.575 kW input output *** Figure 1: Sample gear [A motor power is equal to group leader student number in watts, e.g. ME01081123 so power is 108.1123 kW] The input shaft (shaft-a) is coupled to the motor shaft. The first gear of the gear train is mounted on this shaft and rotates at the same speed as the motor (nin - na = 1200 rpm.) Gear-2 drives the mating gear (gear-3) which is larger, causing the speed of rotation of shaft-be to be slower than shaft-a. It is noted that the speed is not yet down to 155 rpm as desired. A third gear (gear-4) mounted on shaft-be and mate it with gear-5 mounted on the output shaft (shaft-d), which is inline with the input shaft-a. With proper sizing of all four gears, you should be able to obtain an output speed equal or quite close to the desired speed [no=155 rpm.] Each of the shafts are supported by two ball or roller bearings that need to be specified by you [there are six bearings to be selected by the designer!] An overall reliability of 95 %, and a design life of 20.000 h are desired. 16. Based on the given data and the reactions found, you will select bearings for each of the supports. You will need to choose an appropriate load application factor, AF, from Table 11-5. In this selection, the design life, the design speed, and reliability requirements should all be considered. Note that the speeds of the shafts are not the same