The three questions answered take 3 pages to explain, so you can see below, to save writing space.
What kind of system is used to vote for miners soft fork acceptance?
the answer to this you can read here: https://www.investopedia.com/terms/s/soft-fork.aspWho initiates the voting, asks questions to the miners and waits for an answer of acceptance or rejection?
The answer to the second question, you can see here: Bitcoin’s Elegant Upgrade Mechanism: Miner Voting
How does this vote come to miners, how do they see it, and how can they vote to accept or reject?
for this question you can see and read here: Bitcoin and Voting Power or here: How does miner voting work 
