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

### Instruction:
Omi is twice as old as Kimiko. Arlette is 3/4 times as old as Kimiko. If Kimiko is 28 years old, calculate the average age of the three?

### 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.