How to form union expresions

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"