A double and single link list is declared as follows..

A double linked list is declared as follows: struct dilist struct dlist "twd, "bwd int data: Where fwd and bwd represent forward and backward links to adjacent elements of the list. Which segment of code counts the total number of elements in a double linked list, if it is assumed that X points to the first element of the ist and ctr is the variable that counts the total number of elements in the list? DQuestion 12 A single linked list is declared as follows struct sllist struct slist next int data; Where next represents links lo adjacent elements of the list Which scement of code deletes an element (pointed to by pointer XI from the sineke linked Sst. it it is assummed chat X points to neithey the first nor the last oksnent of the 9ss? prav poister points to the previous eloment O xnext pre next: treciprevt