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Q4. Figure below shows a cantilevered chain idler sprocket driven by a roller chain. The chain applies a radial force of 1200-lb and an axial force of 1723-lb to the shaft at point C. Use the application factor of 1.1 (K, 1.1), design life of L= 30,000 hours, and the reliability of 90% for the bearing design. Knowing that the bearing A is a thrust bearing (the bearing B is a regular bearing) and the shaft rotates at co 275 rpm, answer the following questions: i. Determine the critical bearing. How much is the equivalent force (F) of the critical bearing? [25 points F₁- ii. Find the capacity of the critical bearing. Crea iii. Select an appropriate radial bearing size for the critical bearing from L00 series, considering its capacity (Cre). Bearing Size: L iv. Select an appropriate radial bearing size for the critical bearing, considering its capacity and a shaft diameter of 60mm Hint: If it is needed: 1 lbf4.45 N Camping sports 1.75 Chain sprocket-roller chain 1.75 ft KN Bearing Size: ft KN Roller Chain 1200 1723 lb