Answer the questions. $(25$ Points$)$

a$.$ Which linked list does the image below belong to$?(7$ points$)$

b$.$ What expressions should replace $1\mathrm{.}1,1\mathrm{.}2,1\mathrm{.}3,$ and $1\mathrm{.}4?(8$ points$)$

c$.$ What is the time complexity values for prepend, append, lookup, insert, and delete

operations for the linked list in the image? Write them in order. $(10$ points$)$