A product line includes 5 different product styles, and the yearly production of each style is 1089 units. Each product consists of 141 components, and 5 processing operations are needed to produce each component on average, with each operation taking an average of 4.8 min, which includes set up time and part handling time. All operations need a production machine and a human worker. The plant operates 56 hours per week, 48 weeks a year. Determine the number of workers needed to accomplish the processing operations.