4 Refer to Example 12.1 as the basis for this problem. Arvin Meritor hires a team of consultants. The consultants suggest a partial robotic automation as well as an increase in safety stock to 0.125. Arvin Automotive implements these suggestions. The result is an increase in efficiency in both the fabrication of muffler assembly and in the making of catalytic converters. The muf- fler assembly fabrication cell now averages 16 assemblies per hour and the lead time has been decreased to two hours' response time for a batch of 10 catalytic converters. How many kan- ban cards are now needed?