help please

Littlefield Labs processes blood testing jobs and its Station 2 performs the tests. Station 2 has only 1 machine installed and is now unoccupied and can start to process any job available in the queue in front of Station 2. Currently there are four jobs available in the queue: John's Sample Mike's Sample Emma's Sample Ava's Sample Expected 30 minutes Processing Time 150 minutes 90 minutes 220 minutes What should be sequence to process these jobs in order to minimize the average flow time of them? (Hint: note that when the machine is occupied by a job, the processing time for this job will be added to the waiting times of all other jobs in the queue and therefore added to their flow times. Which job should be processed first? Which decision rule can help you minimize total waiting time, e.g., shortest processing time first (SPTF) or longest processing time first (LPTF)?) Ava Mike Emma John Ava Emma Mike John John Mike Emma Ava John Emma Mike Ava 4E Littlefield Labs processes blood testing jobs and for each job a testing kit is used. Littlefield purchases the kits as raw materials from a supplier at a price of $600 each and the money is immediately deducted from an interest-bearing bank account with an annual interest rate of 6% when an inventory replenishment order is placed with the supplier. An order is placed to the supplier as soon as Littlefield runs out of inventory and for each order, the supplier also charges a fixed shipping cost of $2000 for a quick one-hour delivery, regardless the size of the order. It is estimated that Littlefield will have an annual demand of 1100 jobs and daily demand is relatively stable over the year. How many units should Littlefield order each time to minimize its inventory cost? (Your simulation case may vary.) 350 units 61 units O 122222 units 86 units 1100 units