template ____ doublyLinkedList::isEmptyList() const{   
  return (first == nullptr);}
Consider the statements above. The list is empty if the pointer first is ____.

Two types of container classes in the STL are

a. sequence and associative b. box and cylinder c. array and struct d. constant and literal e. None of these

A thread signals a condition variable in order to

A. kill the condition variable B. notify another thread