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

### Instruction:
Roberto and Valerie are jumping rope at recess. Roberto can skip 4,200 times an hour. Valerie can skip 80 times a minute. If they jump rope for fifteen minutes straight, how many skips will they total?

### Response:
 Roberto anaruka mara 70 kwa dakika kwa sababu 4,200 / 60 = <<4200/60=70>>70.
Pamoja, wanaruka mara 150 kwa dakika.
Watafanya jumla ya mara 2,250 kwa sababu 150 x 15 = <<150*15=2250>>2,250.