Consider the following Statements regarding molecular motor:

1. A molecular motor is a protein complex that converts mechanical energy into chemical energy to generate movement.

2. Molecular motors are primarily powered by the hydrolysis of ATP molecules.

3. Myosins, kinesins, and dyneins are the three primary categories of molecular motors.

4. They are responsible for important processes such as muscle contraction and intracellular transport.

Which of the above statement(s) is/are correct?