You are on the implementation team for a company with 2,000 users. You have a business requirement to grant record visibility to sales users, based on their geographic location. You have a second requirement to grant visibility to consultant users based on which product line they support. Each Organization expects managers to be able to see their subordinate's records, but lower level users should not see any records that they do not own, except in several cases. Consultant users need to see the opportunity records that sales users own, if they involve products that they support. And sales users need to see contact and lead records that the consultant users own. If they are located in their sales regions. Which visibility mechanisms would be the best to use to meet these requirements?