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

### Instruction:
Alex has 4 new shirts. Joe has 3 more new shirts than Alex. If Ben has eight more new shirts than Joe, how many new shirts does Ben have?

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