<prompt> Translate the following text to SwahiliThe unit costs expressed in seconds and normalized as explained are estimated by an engineering model19 to allow for simulations over variations of traffic.  <response>: Gharama za kitengo kuonyeshwa katika sekunde na normalized kama ilivyoelezwa ni makadirio na muundo wa uhandisi ili kuruhusu simulations juu ya tofauti ya trafiki. 