Question $1(5$ points$)$

Given the linked list shown above, assume the following statements are executed:

Node $a=$ new Node$(7)$;

a$.$next $=$ cur;

cur.next $=a$;

Consider a loop that starts by initializes a reference to the head node.

In the body of loop, the data value of the referenced node is printed, and the reference is updated to the node's next value.

What are the first $5$ data values printed?