Philosophy homework help

Class Title- 20th Century US HIS since WWII.
You Must Answer All 5 Questions!
Teachers clarification:
For number 2 and 3, I’m talking about imaginary plaques.  In number 2, I’m asking you to imagine that the plaque was created right away in 1968 and was written by congregants of the church.  In number 3, I want you to think about how the information we get from the plaque would change if the words stayed the same, but the people who wrote them and the time they wrote them in shifted.