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

### Instruction:
Maria's test scores are 80, 70, and 90. What score does she need to get on a fourth test so that her average score for the four tests is exactly 85?

### Response:
 Jumla ya alama anazohitaji kupata kwenye mitihani minne ni 4*85=<<4*85=340>>340.
Jumla ya alama anazopata kwenye mitihani mitatu ya kwanza ni 80+70+90=<<80+70+90=240>>240.
Anahitaji kupata alama 340-240=<<340-240=100>>100 kwenye mtihani wa nne.