$|$For Problems $38-42($Table $7-28),$ design a roller chain drive. Specify the chain size, the sizes and number of teeth in the sprockets, the number of chain pitches, and the center distance.

TABLE $7-28$ Chain Drive Design Problems

$\backslash$table$[[$Problem number,Driver type,Driven machine,Input speed $($rpm$),$Input power,Nominal output speed $($rpm$)],[($hp$),($kW$)],[38.,AC$ motor,Hammer mill,$310,25,18\mathrm{.}6,160],[39,AC$ milelor,Agilalui,$750,5,3\mathrm{.}73,325],[40,6-$cylinder engine,Heavy conveyor,$500,40,29\mathrm{.}8,250],[41.,$Steam turbine,Centrifugal pump,$2200,20,14\mathrm{.}9,775],[42,$Hydraulic drive,Rock crusher,$625,100,74\mathrm{.}6,225]]$