A single stage spur gear system is needed to achieve a speed reduction ratio of 9. The center-to-center distance between the gear centers should be exactly 20 in. Interference should not occur. Compute the following, a. (7 pts) Number of teeth both gears (i.e., pinion & gear) b. (7 pts) Diameters of both gears c. (6 pts) Diametral pitch