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

### Instruction:
Christine and Janice are having a contest to see who can throw a ball the highest. They each get three throws. On her first throw, Christine throws it 20 feet high. Janice's throw is 4 feet lower than Christine's. On their second throw, Christine throws it ten feet higher than her first throw and Janice throws it twice as high as her first throw. On the final throw, Christine throws it 4 feet higher than her 2nd throw while Janice throws it 17 feet higher than Christine's first throw. What is the height of the highest throw?

### Response:
 Katika kurusha lake la pili, Christine anarusha mpira juu kwa futi 30 kwa sababu 20 + 10 = <<20+10=30>>30.
Katika kurusha lake la pili, Janice anarusha mpira juu kwa futi 40 kwa sababu 20 * 2 = <<20*2=40>>40.
Katika kurusha lake la tatu, Christine anarusha mpira juu kwa futi 34 kwa sababu 30 + 4 = <<30+4=34>>34.
Katika kurusha lake la mwisho, Janice anarusha mpira juu kwa futi 37 kwa sababu 20 + 17 = <<20+17=37>>37.
Kurusha sita ni futi 20, futi 30, futi 40, futi 34, futi 37, na futi 37.
Urefu wa kurusha juu zaidi ni futi 37.