Answer: Check below :)
Explanation:
a. Looking at the picture, you can assume ∠ABC is 90°, ∠ABD and ∠CBD are each 45° and complementary.
b. It looks like ray l bisects because bisecting means splitting into 2 equal parts, and ray l most likely has bisected ∠ABC into ∠ABD and ∠CBD.
c. You need to find out if ∠ABD and ∠CBD are congruent, or in other words, their sides are angles are equal measure.
Hope that helped a lot.
:)