Which of the following statements is correct?

(1) The presence of reacting species in a covered beaker is an example of open system.

(2) There is an exchange of energy as well as matter between the system and the surroundings

in a closed system. 

(3) The presence of reactants in a closed vessel made up of copper is an example of a closed

system.

(4) The presence of reactants in a thermos flask or any other closed insulated vessel is an

example of a closed system.