1. **Observed:**
   - Checked loopback address and verified it was 141.101.0.1.
   - Advertised loopback address to neighbors B and E.
   - Verified current routing table.
   - Waited for neighbor confirmations.
   - Requested connectivity verification from B and E.
   - Pinged B's and E's loopback addresses.
   - Reported completion of the experiment.

2. **Decided:**
   - To check and advertise the loopback address for end-to-end reachability.
   - To verify the routing table and wait for neighbor confirmations.
   - To request and perform connectivity verification.
   - To report the completion of the experiment.

3. **Why:**
   - Ensuring the loopback address was known and reachable by neighbors.
   - Confirming the routing table was correctly configured.
   - Allowing time for neighbors to process and respond.
   - Verifying that the advertised routes were functional.
   - Providing a complete picture of network connectivity.
   - Signaling that the network was fully configured and operational.