In the diagram below, draw and label the time periods captured by MTTD (Mean Time To Discover a problem) and MTTI (Mean Time To Invoke a solution). The time period captured by MTTR (Mean Time To Recover/Repair) has been drawn and labeled for you as a example. MTTR Correct behavior Diagnose Repair Correct behavior First Failure Begin Repair End Repair Second Failure Q9) (2 pts) In your own words, explain what does RFC4949 define as a "trusted system" and a "trustworthy sys- tem", and discuss the key differences of the 2 concepts. Q10) (1 pt) In your own words, describe the main differences between Secure boot and Authenticated boot. Q11) (2 pts) Explain why under authenticated boot, the PCRs of the TPM are initialized to some fixed default values (e.g., 0) instead of random values when the system starts. Q12) (2 pts) Referring to the remote attestation protocol shown below, explain the reason why (i) the nonce is needed, and (ii) the TPM signs with AIK instead of EK. nonce certAIK, SignAIK(nonce, PCR), SML Verifier