A 200 mL sample of water has an initial pH = 9. In order to determine alkalinity, the sample was titrated using 0.02 N \( \text{H}_2\text{SO}_4 \) acid to an end point of pH = 4.5. In the titration, 25 mL of 0.02 N \( \text{H}_2\text{SO}_4 \) acid was required. What is the total alkalinity of the sample in ‘mg/L as NaHCO\(_3\)’?
[Atomic weight (g/mol): Ca = 40, Na = 23, H = 1, C = 12, S = 32, and O = 16]