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

### Instruction:
The half-hour newscast includes 12 minutes of national news, 5 minutes of international news, 5 minutes of sports, and 2 minutes of weather forecasts. The rest is advertisements. How many minutes of advertising are in the newscast?

### Response:
 Urefu jumla wa kipindi cha habari ni dakika 30.
Urefu wa kipindi cha habari bila matangazo ni dakika 12 + 5 + 5 + 2 = <<12+5+5+2=24>>24.
Hivyo, urefu wa matangazo ni dakika 30 - 24 = <<30-24=6>>6.