+ 1,

Indeed, (10.3.4) is straightforward, and (10.3.5) means that a t time 7:,,, [TT > 71, ant1 (2-t S(?],) = n k ] for some O 5 k 5 n - 1; and afterward k customers are served dul.ilig (U,, t] (which occurs with probability give11 by (10.2.3)).