4. (2 points) A city is pumping groundwater at 200 m³/min to use as drinking water. The water analysis
at pH 8.43 is given in the table below (with extra space you may find useful):



Please help asap! I just need the last part.
For the other parts I got (a) 242.10, (b) 160.79, (c) 160.79, (d) 81.31