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

### Instruction:
In a graduation ceremony, each graduate can bring their 2 parents. Twenty teachers and half as many administrators will also attend the graduation ceremony. If there are 50 graduates, how many chairs must be prepared for the ceremony?

### Response:
 Kila mhitimu analeta wazazi 2, hivyo 50 x 2 = <<50*2=100>>100 wazazi watahudhuria.
Kuna walimu 20 na 50/2 = <<50/2=25>>25 wasimamizi, hivyo 45 x 2 = <<45*2=90>>90 walimu na wasimamizi watahudhuria.
Jumla ya watu wanaohudhuria ni 100+90 = <<100+90=190>>190.