$8.$ Inspect the contents of the first HTTP GET request from your browser to the

server. Do you see an $$IF$-$MODIFIED$-$SINCE$$ line in the HTTP GET?

$9.$ Inspect the contents of the server response. Did the server explicitly return the

contents of the file? How can you tell?

$10.$ Now inspect the contents of the second HTTP GET request from your browser to

the server. Do you see an $$IF$-$MODIFIED$-$SINCE:$$ line in the HTTP GET? If

so$,$ what information follows the $$IF$-$MODIFIED$-$SINCE:$$ header?

$11.$ What is the HTTP status code and phrase returned from the server in response to

this second HTTP GET? Did the server explicitly return the contents of the file?

Explain.