In the diagram shown, the ladder platform and the brace are both parallel to the floor. If the brace is attached to each leg at its midpoint, how long is the brace?

A. 9 ft.
B. 1.5 ft
C. 4.5 ft
D. 5 ft

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