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

### Instruction:
 Mti mrefu zaidi kati ya miti 3 ni futi 108. Mti wa ukubwa wa kati ni futi 6 chini ya nusu ya urefu wa mti mrefu zaidi. Mti mdogo ni 1/4 ya urefu wa mti wa kati. Urefu wa mti mdogo ni kiasi gani?


### Response:
 Mti mrefu zaidi: futi 108
Mti wa ukubwa wa kati: (108/2)-6
Mti mdogo: 1/4((108/2)-6) = futi 12