Answer:
Question 54a: Option A
Question 54b: Bisect <JKM
Question 54c: First, bisect the 60 degree angle to create a 30 degree angle. Next you bisect the 30 degree angle to create 15 degree angle.
Explanation:
Question 54a: ray KM, is a bisector of <JKL, thus m<JKM is 1/2 of <JKL
Question 54b: Bisecting a angle the is half of another angle would create an angle that is one fourth of the overall angle.
Question 54c: Bisecting angles cuts them in half.