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

### Instruction:
 Katika sherehe ya mahafali, kila mhitimu anaweza kuwaleta wazazi wao 2. Walimu 20 na nusu ya idadi hiyo ya wasimamizi pia watahudhuria sherehe ya mahafali. Ikiwa kuna wahitimu 50, ni viti vingapi vinapaswa kuandaliwa kwa sherehe hiyo?


### 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.