Been a while since I've done this but from my memory the answers are
2. Reason: KL = LM
3. Statement: Definition of midpoint
4. Statement: L is the midpoint of KM
5. Reason: Transitive Property of Congruence
Hope this helps!
2. KL = LM
3. Definition of midpoint
4. L is the midpoint of KM
5. Transitive Property of Congruence
