1. The *-property requirement for append access [SC(S) SCO is looser than for write access SC(S)-SC(O)]. Explain the reason for this. 2. In the example illustrated in Figure 13.2, state which of the eight BLP rules are invoked for each action in the scenario. 3. In Figure 13.8, one link of the Trojan horse copy-and-observe-later chain is broken. T here are two other possible angles of attack by Alice: Alice logging on and attempting to read the string irectly, and Alice assigning a security level of sensitive to the back-pocket file. Does the eference monitor prevent these attacks