Question: Will the mechanism Message Integrity and Authentication via Message Authentication Code ( MAC ) Links to an external site.achieve the following services? Confidentiality Please explain

Will the mechanism Message Integrity and Authentication via Message Authentication Code (MAC)
Links to an external site.achieve the following services?
Confidentiality
Please explain your assessment
Integrity
Please explain your assessment with these cases:
Case 1: Eve changes msg, but not MAC.
Case 2: Eve changes MAC, but not msg.
Case 3: Eve changes both msg and MAC.

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