Consider an HTTP server and client as shown in the figure below. Suppose that the RTT delay between the client and server is $21$ msecs; the time a server needs to transmit an object into its outgoing link is $0\mathrm{.}5$ msecs; and any other HTTP message not containing an object has a negligible $($zero$)$ transmission time. Suppose the client again makes $74$ requests, one after the other, waiting for a reply to a request before sending the next request.

Assume the client is using HTTP $1\mathrm{.}1$ and the IF$-$MODIFIED$-$SINCE header line. Assume $39\%$ of the objects requested have NOT changed since the client downloaded them $($before these $74$ downloads are performed$)$

Answer to $1$ decimal place