<prompt> Translate the following text to EnglishKwa mfano, katika hali zilizotajwa hapo juu, bei ya umeme inatarajiwa kuongezeka kwa karibu 30 kwa hali ya D hadi 50 kwa hali ya A kufikia mwaka 2015.  <response>: The model suggests that under the conditions described above, electricity prices are expected to increase by about 30 under scenario D to 50 under scenario A by the year 2015. 