Let's focus on just this third$$ HTTP GET request. How many round trip times $($RTTs$)$ are needed from when the browser issues the third HTTP GET request, until the reply for that third GET request is received? You should take into account any TCP setup time $($if any$)$ required before an HTTP GET is$$ sent by the client, the time needed for the server to transmit a requested object $($if any$),$ and any propagation delays $($if any$)$not accounted for in these other amounts of time.