Assume you have the following jobs to execute with one processor: give the average wait time for this set of processes using the following algorithms. specify the arbitration rule used for each algorithm, if needed. (a) first in first out (b) shortest job next (non-preemptive) (c) shortest remaining time next (pre-emptive) (d) round robin, with a quantum of 7 (e) round robin, with a quantum of 5 plus context switch time of 1

Athin walled concentric tube exchanger is used to cool engine oil from 160°c to 60°c with water that is available at 25°c acting as a coolant. the oil and water flow rates are each at 2 kg/s, and the diameter of the inner tube is 0.5 m and the corresponding value of the overall heat transfer coefficient is 250 w/m2. oc. how long must the heat exchanger be to accomplish the desired cooling? cpwater=4.187 kj/kg-candcpengine el=2.035 kj/kg·°c, oil . 120]