UON conducts both face to face (FF) and online (OL) classes that are intended to beidentical. Given below are the distributions of the two groups in terms of marks scored in astatistics examination....

UON conducts both face to face (FF) and online (OL) classes that are intended to beidentical. Given below are the distributions of the two groups in terms of marks scored in astatistics examination. The modal mark is known for each group and given as 68 for face toface and 64 for online students respectively.Marks 30- 40 40- 50 50- 60 60- 70 70- 80 80 – 90 90-100 TotalF.F Students 6 18 12 f1 18 f2 12 100O.N Students 5 15 f1 22 19 11 f2 100a. Find the missing frequencies f1 and f2 for each.