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

### Instruction:
 Marcus, Humphrey, na Darrel wanatazama ndege. Marcus anaona ndege 7, Humphrey anaona ndege 11, na Darrel anaona ndege 9. Wanaona ndege wangapi kwa wastani kila mmoja wao?


### Response:
 Idadi ya jumla ya ndege waliyoona watu watatu wanaotazama ndege ni 7+11+9 = <<7+11+9=27>>27 ndege.
Kwa kuwa kuna watu watatu wanaotazama ndege, idadi ya wastani ya ndege wanazoona kila mmoja wao ni 27/3 = <<27/3=9>>9 ndege.