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

### Instruction:
 Omi ni mara mbili zaidi ya umri wa Kimiko. Arlette ni 3/4 ya umri wa Kimiko. Ikiwa Kimiko ana miaka 28, hesabu umri wa wastani wa watatu hao?


### Response:
 Ikiwa Kimiko ana miaka 28, Omi ana miaka 2 * 28 = <<28*2=56>>56.
Arlette ana miaka 3/4 * 28 = <<3/4*28=21>>21.
Ukiweka pamoja umri wao, jumla ni miaka 56 + 21 + 28 = <<56+21+28=105>>105.
Umri wa wastani kwa watatu hao ni miaka 105 / 3 = <<105/3=35>>35 kwa kila mtu.