Given the following code:Let's say in the main function the following statements are executed. Assume that the linkedlist is initially empty.head $=$ mystery$($head$,102)$;head $=$ mystery$($head$,78)$;head $=$ mystery$($head$,154)$;head $=$ mystery$($head$,23)$;

What does the linked list look like after these set of function calls are made?

$2315478102$

$1027815423$

$1027815423$ null

$2315478102$ null