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

### Instruction:
Djibo is 17 years old. Five years ago Djibo added his age with his sister's age and the sum was 35. How many years old is Djibo's sister today?

### Response:
 Umri miaka mitano iliyopita: 17 - 5 = <<17-5=12>>12
Umri wa dada miaka mitano iliyopita: 35 - 12 = <<35-12=23>>23
Umri wa dada leo: 23 + 5 = <<23+5=28>>28 miaka
Dada wa Djibo ana miaka 28 leo.