Because physicians at a BPH clinic use an EHR system that is not fully interfaced with the system used by the hospital, some patient data have to be manually reinputted into the hospitals system. The clerk in charge of this task has just received a list of five patient charges. Their importance is evaluated in terms of their contribution to revenue. The clerk wants to minimize weighted tardiness. The data input will start now, at time 0. Help her find the best sequence to achieve that objective using the FCFS, SPT, EDD, and CR rules. (i need the most help with the critical ratio CR)

critical ratio: due date-initial value/ processing time

weighted tardiness= weight assigned to job times itd tardiness

Due Date Weight Patient Record B Arrival Time (min) -5 -4 Processing Time (min) 10 9 65 30 B 20 18 -3 15 20 15 7 D -2 5 15 E E -1 12 40 10