Need help with networking question for my homework

First time here! I don't know if this is the right place to post but the question is :

​

Jimmy is given the IPv4 network address of 172.16.99.0/25 from his HQ. He has equally subnet the given address block to support the following departments:

Finance = 20 hosts

Human resource = 16 hosts

Procurement = 14 hosts

​

Q: Determine the maximum number of subnets :

The answer for it is 4 according to my answer sheet but i can't seem to find the reason why as i have 5 host bits so 2^5-2 = 30 subnets. shouldn't the maximum number of subnets be 30 and not 4? I can't seem to get 4 no matter what.