You can use several If activities after you’ve added the confidence column
The conditions would be written as below
For high:
Row(0).ToString = "yes" AndAlso Row(1).ToString = "yes" AndAlso Row(2).ToString = "yes"
For low:
Row(0).ToString = "yes" AndAlso Row(1).ToString = "no" AndAlso Row(2).ToString = "no"
For medium:
Row(0).ToString = "yes" AndAlso Row(1).ToString = "no" AndAlso Row(2).ToString = "yes"