Which of the following statements are correct about the below declarations?
char *p = "Sanjay";
char a[] = "Sanjay";

1:	There is no difference in the declarations and both serve the same purpose.
2:	p is a non-const pointer pointing to a non-const string, whereas a is a const pointer pointing to a non-const pointer.
3:	The pointer p can be modified to point to another string, whereas the individual characters within array a can be changed.
4:	In both cases the '\0' will be added at the end of the string "Sanjay".