According to a survey, 57.8% of college-seeking high school seniors say they have taken one of the standardized tests for potential college students. Of these, 35.6% say they do not plan to submit their score with their college applications.

(a) Find the probability that a randomly selected college-seeking high school senior took one of the standardized tests and does not plan to submit this score with their college applications.

(b) Find the probability that a randomly selected college-seeking high school senior took one of the standardized tests and plans to submit this score with their college applications.

(c) Would either of the events in part

(a) or

(b) be considered unusual?
Explain.