Cablesplice, Inc.’s manufacturing process consists of five steps: making conductors, adding insulation, adding sheathing, irradiation, and printing and coil cutting. Units are measured in meters. In 970,000 meters of cable, 700 defects were found in the conductors, and 75,000 defects were found in the insulation. In 440,000 meters of cable, 8,930 defects were found in the sheathing, and no defects were found in the remaining two steps. 

(a) Find DPU and the dpmo

(b) The sigma level for each process step.