Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
A Whatsapp group has members sending messages every day sharing about how each one's day was. Last week, 300 messages were sent by the members on Monday, 200 messages on Tuesday, 300 more messages on Wednesday than the previous day, and two times as many messages on Thursday as there were on Wednesday. Calculate the number of messages sent in the Whatsapp group after the four days.

### Response:
 Ikiwa idadi ya ujumbe uliotumwa siku ya Jumatatu ilikuwa 300, basi Jumanne kulikuwa na ujumbe 200. Jumla ya ujumbe uliotumwa katika siku mbili ni 300+200 = <<300+200=500>>500 ujumbe.
Siku ya Jumatano, idadi ya ujumbe uliotumwa ilikuwa 300 zaidi ya siku iliyotangulia, jumla ya 300+200 = <<300+200=500>>500 ujumbe.
Jumla ya ujumbe uliotumwa katika siku tatu ni 500+500 = <<500+500=1000>>1000 ujumbe.
Siku ya Alhamisi, idadi ya ujumbe uliotumwa ilikuwa mara mbili ya idadi ya ujumbe uliotumwa siku ya Jumatano, jumla ya 2*500 = <<2*500=1000>>1000 ujumbe.
Katika siku nne, idadi ya ujumbe uliotumwa ni 1000+1000 = <<1000+1000=2000>>2000 ujumbe.