These questions are about Data Structures. I need very short answers for below questions.

4. Use the copy function to copy six elements from the start of an array x into an array y starting at y[42]. 5. Why isn't the bag's operator function a friend function? 6. Suppose we implement the += operator as shown below what goes wrong with b+= b? A Wrong Member Function Implementation void bag: operator +=(cons t bag& addend) /7 Library facilities used: cassert size type i; // An array index assert(sieaddend.sizeCAPACITY) for (i 0;