1. Get the trDFgrouped data starting from the May heavy day counts to the August heavy counts 2. Group xyz customers using BUYER_STATUS, heavyCat, and ZIP, and apply np. sum function on the aggregated data for YTD_SALES_2009 and LTD_SALES columns

Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.