Use the PRECEDENCE DIAGRAM below to answer the next THREE questions: ALL TIMES LISTED ARE IN SECONDS. SUM OF ALL WORK ELEMENTS = 120 SECONDS. If the cycle time is 50 seconds, what would be the theoretical minimum number of workstations? 3 Workstations 5 Workstations 4 Workstations 2 Workstations If the production manager used an assembly line with 6 workstations and a cycle time of 30 seconds, what would the idle time of the line designed by that production manager be? None of the other choices is correct. 120 seconds 30 seconds 60 seconds 180 seconds