I'd completed almost all part of Unit 7 except the final assessment. I can't seems to find the mentioned tab called "data tab" in the excel file named "DAM11". There is only one tab named "Beeland Network" in the excel file. I think there is missing tab in the excel file.
If you could read again the prologue of the final section before starting the analysis, it is clearly stated that we need the "data tab" to undertake the analysis.
I'd however email ACCA to rectify this issue, I'm currently waiting for their prompt reply. Hope to get a respond soon from ACCA.