"Problem" usually refers to the situation when an individual is facing an unattainable goal, that is, there is an obstacle on the way to the goal. We call it a problem. One of the fundamental characteristics of a problem is obstacle. The objective obstacle is not the problem itself. The problem is raised by the individual who encountered the obstacle. It is always understood and expressed in a certain way. What does the above text indicate that the problem solving process is essential? ['Realize the transformation from the initial state to the target state.', 'Including a series of arithmetic or psychological operations.', 'How to grasp the existing or given information.', 'Relying on a series of cognitive operations.']