yes i am
Unless your brother has some sort of physical or mental disability or long term illness, I am afraid the first condition would be difficult to meet to qualify. The other conditions may be met if there is no other family in Kenya who can look after your brother.
The other option is to adopt him whilst he is still under 18 but this would be a lengthly process and I doubt can be done before he turns 18 in April.
I would suggest that you retain a Solicitor specialising in UK immigration law if you decide to make an adult dependant visa application.
Hope this helps
could you kindly advice me how to get the right information reference the adoption. the advice i had was from adoption agency