Aggregation vs Composition vs Association in C#

Question 1 :- What are the different types of "USING/HAS A" relationship ? Question 2 :- What is a composition relationship ? Question 3 :- Explain Aggregation ? Question 4 :- Explain Association ? Question 5 :- Differentiate between Composition vs Aggregation vs Association ? Question 6 :- UML Symbols for Composition, Aggregation and Association