Assume a linked list contains following integers: -3, 2, x, 5, 8, x, 15 and the pointer head is pointing to the first node of the list. What will be the value of variable a after the following statements are executed:

Node *curNode=head;

while(curNode->getNext()!=NULL){

curNode=curNode->getNext();

}

int a;

a=curNode->getItem();

Group of answer choices

15

x

27+2x

15+2x