At a food safety inspection desk, all of the following rules apply to an inspection file. Rules: (1) If the inspection file is given the Indigo slot, then it is assigned to Helix desk. (2) The inspection file is assigned to Helix desk only if it is included in the Jasper packet. (3) The inspection file cannot be both included in the Jasper packet and reviewed under the Keystone rule. (4) If the inspection file is included in the Jasper packet, then it is assigned to Helix desk. (5) At least one of these is true: the inspection file is assigned to Helix desk, or it is included in the Jasper packet. It is established that the inspection file is given the Indigo slot; and the inspection file is not reviewed under the Keystone rule. Which answer remains possible, though not necessary?