How do I calculate the rest of the information using the data provided?

KBrO3 Concentration (M): 0.020 \begin{tabular}{|l|l|l|l|} \hline & \multicolumn{1}{|c|}{ Flask 1 } & \multicolumn{1}{|c|}{ Flask 2} & \multicolumn{1}{c|}{ Flask 3} \\ \hline Initial burette reading: & 0mL & 1.00mL & 1.00mL \\ \hline Final burette reading: & 20.03mL & 21.20mL & 21.10mL \\ \hline Volume added: & 20.03mL & 20.20mL & 20.10mL \\ \hline Moles of KBrO3 & 4.006104mol & 4.04104mol & 4.02104mol \\ \hline \end{tabular} Na2S2O3 Concentration (M): 0.0998 \begin{tabular}{|l|l|l|l|} \hline & \multicolumn{1}{|c|}{ Flask 1 } & \multicolumn{1}{|c|}{ Flask 2 } & \multicolumn{1}{|c|}{ Flask 3 } \\ \hline Initial burette reading: & 1.00mL & 1.00mL & 1.00mL \\ \hline Final burette reading: & 12.60mL & 12.40mL & 12.80mL \\ \hline Volume titrated: & 11.60mL & 11.40mL & 11.80mL \\ \hline Moles of Na2S2O3 & 1.16103mol & 1.14103mol & 1.18103mol \\ \hline \end{tabular} F