A speed-reducer has 20° full-depth teeth, and the single-reduction spur-gear gearset has 22 and 60 teeth. The diametral pitch is 4 teeth/in and the face width is 3½ in. The pinion shaft speed is 1145 rev/min. The life goal of 5-year 24-hour-per-day service is about 3(10%) pinion revolutions. The absolute value of the pitch variation is such that the quality number is 6. The materials are 4340 through-hardened grade 1 steels, heat-treated to 250 Brinell, core and case, both gears. The load is moderate shock and the power is smooth. For a reliability of 0.99, rate the speed reducer for power. Hints: Assume a commercial enclosed unit, uncrowned teeth, and size factor K$=1 There are four cases: pinion and gear bending, and pinion and gear wear For each case, set the AGMA stress equal to the strength, and determine the corresponding maximum tangential load that can be transmitted, Wt. Use S=S₁=1 in the strength equations. From each W, find the corresponding horsepower, H Of the four horsepower values, choose the one that controls (lowest value)