If you don't post any code to show that you have at least tried, then it looks like you are trying to get us to write some school homework for you. Show us what you have tried and we will help.
Sometimes when I need to search through cluster arrays with some element values excluded, I do like this
Download File:post-5958-1206627103.vi
1. Turn cluster array into a boolean cluster array by checking equality
2. Filter the active element by performing an AND operation
3. Search for the desired boolean cluster pattern
In this case the resulting index is 4, since the first element wasn't activated.
Hope this helps.
/J