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

### Instruction:
In preparation for his mountain climbing, Arvin wants to run a total of 20 kilometers in a week. On the first day, he ran 2 kilometers. On each subsequent day, he increased his running distance by 1 kilometer over the previous day. If he runs for 5 days a week, how many kilometers did he run on the 5th day?

### Response:
 Siku ya pili, Arvin alikimbia 2 + 1 = <<2+1=3>>3 kilomita.
Siku ya tatu, alikimbia 3 + 1 = <<3+1=4>>4 kilomita.
Siku ya nne, alikimbia 4 + 1 = <<4+1=5>>5 kilomita.
Hivyo, siku ya tano, alikimbia 5 + 1 = <<5+1=6>>6 kilomita.