Chemical calculations

. An aqueous solution contains a mixture of NaOH anf Na₂CO). A 20.0 cm³ of this solution was titrated with a 0.10 M solution of HCl using phenolphthalein as the indicator. The volume of HCI consumed at the end point was 16.0 cm³. Then few drops of Methyl orange were added to the same solution and the titration was continued. The volume of HCI used at the second end point was 22.0 cm³ Calculate the concentrations of NaOH and Na₂CO) in the solution