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

### Instruction:
 Alex ana shati mpya 4. Joe ana shati mpya 3 zaidi ya Alex. Ikiwa Ben ana shati mpya 8 zaidi ya Joe, Ben ana shati mpya ngapi?


### Response:
 Joe ana shati mpya 4 + 3 = <<4+3=7>>7.
Ben ana shati mpya 8 + 7 = <<8+7=15>>15.