1. What distinguishes a linked list from an array? 2. What is the output of the following C++ code, given the input data 5, 6, 3 and 1? #include using namespace std; struct PersonNode int SocSecNum; PersonNode* Next; int main() int SSNumber; PersonNode* ptr; PersonNode* head = NULL; cout > SSNumber; while (cin) ptr = new PersonNode; ptr->SocSecNum = SSNumber; ptr->Next = head; head = ptr; cout > SSNumber; ptr = head; cout SocSecNum; ptr = ptr->Next; cout