<prompt> Translate the following text to SwahiliThe marginal costs of emission reductions over the period 2005 through 2015 are shown in Figures 6 through 9 for all four scenarios.  <response>: Gharama za chini za kupunguza uzalishaji katika kipindi cha 2005 hadi 2015 zinaonyeshwa katika picha 6 hadi 9 kwa matukio yote manne. 