12- For the system shown if the system identified with following data: Motor speed 1500 rpm,, pulley diameters; D1= 0.2m and D2= 0.4m, Z1= 50 and Z2= 30,; fan with number of blades are 9. calculate the following: Gears mesh frequency? Belt frequency? Van passing frequency? Write the suitable machinery vibration problems and its frequency order in the system given to the related spectrum? ■ If the system bearing (B2) was subjected to specific fault, resulted breakdown in one rolling element, depend on the data given please specify the fault spectrum. Assume Bearing contact angle is 2.5". If the system coupling subjected to angular misalignment, please draw the expected vibration amplitude spectrum in the frequency domain? B2 B1 min. 32 mm max 0.5 max. 55 mm min. 69 mm D, D. ba min. 2.2 mm Ca max. 4.98 mm max. 1 mm