Regarding Case study-1 dataset

Could you please confirm whether dataset given in casestudy-1 is not corrupt and it only contains below 8 rows. If data is correct than how to find rolling avg for 7 days as data contains only 6 unique dates? ds jobid actorid event language time_spent org 11/30/2020 21 1001 skip English 15 A 11/30/2020 22 1006 transfer Arabic 25 B 11/29/2020 23 1003 decision Persian 20 C 11/28/2020 23 1005 transfer Persian 22 D 11/28/2020 25 1002 decision Hindi 11 B 11/27/2020 11 1007 decision French 104 D 11/26/2020 23 1004 skip Persian 56 A 11/25/2020 20 1003 transfer Italian 45 C