1) In a singly linked list L, two pointers p and q point to different nodes that guaranteed to be neither the first nor the last node. a. What is the purpose of the following code block? (5%) t-p->data; p->data-q-> data; q->data=t; b. Write a code block that removes the 2nd node of L (5%) c. Write a code block that removes the previous node of q (5%)