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

### Instruction:
 Ali alifikisha miaka 8 mwaka huu, na sasa ana umri wa miaka 3 zaidi ya Yusaf. Ikiwa Umar ni mara mbili ya umri wa Yusaf, Umar ana miaka mingapi?


### Response:
 Ikiwa Ali ana umri wa miaka 3 zaidi, basi Yusaf lazima awe na miaka 8 - 3 = 5.
Umar ni mara mbili ya umri wa Yusaf, hivyo lazima awe na miaka 5 * 2 = <<2*5=10>>10.