A batch reactor is being used to destory chemcial A with a initial conentration of $100$ mg$/$L$.$ The reaction can be characterized by second order $($r $=-$kC$2),$ with a rate constant of $0\mathrm{.}0006$ L$/$mg$-$min. Please apply the Euler$$s emthod, using a spreadsheet to calculate the concentration of chemical A after $1$ hours, using three time steps: $2$ min, $1$ min and also $0\mathrm{.}5$ min. Please compare the results and briefly explain why the results are different $($or the same$).$