This is for Java

6. Insert 2, 3, 18 and 29 in the doubly linked list. a. Draw the doubly linked list after the values are inserted (without dummy head) b. For the value 18 what is the next element? Write the code to get the next element What is the previous element? Write the code to get the previous element i. ii. iii. iv. c. Write the algorithm to remove the first element in the doubly linked list. d. Head | i. Write the algorithm to remove node z ii. What is the answer for tan