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

### Instruction:
There are 19 students in the 3rd grade and twice that number in the 4th grade. There are 10 boys and 19 girls in the 2nd grade. How many students are there in total?

### Response:
 Katika darasa la tatu, kuna wanafunzi 19
Kuna 2 × 19 = 38 wanafunzi katika darasa la nne.
Hivyo, kuna jumla ya wanafunzi 19 + 38 = 57 katika darasa la tatu na la nne.
Hivyo, kuna wavulana na wasichana 10 + 19 = 29 katika darasa la pili.
Hivyo, kuna jumla ya wanafunzi 57 + 29 = 86 katika shule.