Which of the following statements are correct about the Collection Classes available in Framework Class Library?

• Elements of a collection cannot be transmitted over a network.
• Elements stored in a collection can be retrieved but cannot be modified.
• It is not easy to adopt the existing Collection classes for newtype of objects.
• Elements stored in a collection can be modified only if allelements are of similar types.
• They use efficient algorithms to manage the collection, thereby improving the performance of the program.