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

### Instruction:
Janet's grades for her first semester of college were 90, 80, 70, and 100. If her semester 2 average was 82 percent, how much higher was her semester 1 average compared to her semester 2 average?

### Response:
 Wastani wa muhula wa kwanza ni (90+80+70+100)/4 = <<(90+80+70+100)/4=80>>80
Wastani wa muhula wa pili ni 82
Tofauti kati ya wastani wa muhula wa kwanza na wastani wa muhula wa pili ni 80-82 = -<<80-82=-2>>2