We spin an arrow attached to the center of a circular board. let θ be the angle of the arrow where 0 < θ ≤ 2π. the probability that θ falls in a subinterval of (0, 2π] is equal to the length of the subinterval divided by 2π. we define the rv x(θ) = θ/2π. what is sx? find and plot the cdf fx(x) and the pdf fx(x).