2. Assuming time cost is the most important thing in our decision making process, present at least ONE example scenario that can best be solved by using a circular singly linked list (no need for a doubly linked list), explain WHY (3 point) 3. Assuming each reference costs 1 byte, and each piece of data/info costs 1 byte as well. When will a doubly linked list be more appropriate when space cost is the most important thing in our decision making process comparing to a 256 element array? Why? (3 point)