<prompt> Translate the following text to SwahiliAgain, the move from offering no discount to offering a discount of 4.5a is a Pareto optimal move-no one is worse off and someone is substantially better off.  <response>: Kwa hivyo, kuhamia kutoka kutoa punguzo la 4.5 hadi 4.5a ni hatua bora ya Pareto - hakuna mtu aliye mbaya zaidi na mtu mwingine ni bora zaidi. 