The test marks of DSA and PF are maintained in the linked lists. You are supposed to perform the following tasks and show all the required changes. (a) Insert 79 at the beginning of DSA. (b) Insert 67 at the end of PF (c) Delete the first element from PF (d) Delete the last element of DSA Note: Attempt all parts in strict sequence otherwise your answer might be wrong. Each time you have to work on updated linked list (e.g if the AVAIL changed at part (a), then you have to take this updated value in part (b) and so on) Add TEST LINK 1 12 DSA 5 11 PF 10 AVAIL 6 ▬▬▬ 223 4 5 67 7 8 B9212 10 11 88 71 96 88 62 36 76 71 06000NON+3 7 8 2