Each of the following member functions has errors in the way it performs a linked list ope...

Each of the following member functions has errors in the way it performs a linked list operation. Find as many mistakes as you can.

void NumberList::deleteNode(double num){   ListNode *nodePtr, *previousNode;   // If the list is empty, do nothing.   if (!head)      return;   // Determine if the first node is the one.   if (head->value == num)      delete head;   else   {      // Initialize nodePtr to head of list.      nodePtr = head;      // Skip all nodes whose value member is      // not equal to num.      while (nodePtr->value != num)      {         previousNode = nodePtr;         nodePtr = nodePtr->next;      }      // Link the previous node to the node after      // nodePtr, then delete nodePtr.      previousNode->next = nodePtr->next;      delete nodePtr;   }}