Which of the following statements are the CORRECT for estimation of plastering? 
1) For opening up to 0.5 square meters, no deduction is made. 
2) For opening exceeding 0.5 square meters and up to 3 square meters, deduction is made for one face. 
3) For opening up to 3 square meters, deduction is made for both faces. 
3) For ends of beams, no deduction is made.