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

### Instruction:
A mountain range has 200 active volcanoes. In a particular year, 20% of the volcanoes exploded in the first two months, 40% of the remaining exploded by the half of the year, and at the end of the year, another 50% of the volcanoes that hadn't already erupted also exploded. How many mountains are still intact at the end of the year?

### Response:
 Kulikuwa na mlipuko wa <<200/5=40>>40 katika miezi miwili ya kwanza.
Idadi ya milima ambayo haijalipuka baada ya mzunguko wa kwanza ni 200-40 = <<200-40=160>>160
Katika nusu ya mwaka, 160/100*40= <<160/100*40=64>>64 milima zililipuka.
Idadi ya milima ambayo haijalipuka baada ya mlipuko wa pili ni 160-64 = <<160-64=96>>96
Mwishoni mwa mwaka, 96/2= <<96/2=48>>48 milima zililipuka, zikiacha 96-48 = <<96-48=48>>48 milima bado haijaharibiwa.