Please help me ): it's not that hard

As voters exit the polls, you ask a representative random sample of voters if they voted for a proposition. if the true percentage of voters who vote for the proposition is 63%, what is the probability that, in your sample, exactly 5 do not voted for the proposition before 2 voted for the proposition? the probability is

Yvaries inversely as x. y =12 when x=5. find y when x=4

I'm marking the brainliest and it's 15 points