4. An Auto body shop has five cars waiting to be repaired. The shop is quite small, so only one car can be repaired at a time. The number of days required to repair each car and the promised date for each are given in the following table. Compare the performance of the four sequencing rules FCFS, SPT, EDD and CR relative to minimizing average tardiness. (25pts) Cars 1 2 Repair time (days) Promised Date 3 5 2 6 1 9 3 4 4 11 5 5 8