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

### Instruction:
 Ali a eu 8 ans cette année et est maintenant 3 ans plus âgé que Yusaf. Si Umar a deux fois l'âge de Yusaf, quel âge a Umar ?


### Response:
 Yusaf a 8 - 3 = <<8-3=5>>5 ans.
Umar a 5 * 2 = <<5*2=10>>10 ans.