B. Upon closer inspection, the supplier determines that the demand for valves is normally distributed with mean 4 valves per day and standard deviation 3 valves per day. (The supplier is open 300 days per year.) It usually takes about 4 days to receive an order from a factory. 1) What is the pipeline inventory? 2) What is the standard deviation of usage during the lead time? 3) Determine the reorder point needed to achieve a service level of 95.05 percent. 4) What is the safety stock? What is the total holding cost associated with this safety stock? 5) How would your analysis in 3. change if the service level changed to 98.05 percent? TABLE A Standard normal probabilities (continued) m 01 02 03 04 05 .06 07 08 09