A solution of aqueous chlorine is fed into an open channel for disinfection purposes at the City of Akron water treatment plant. However, only the HOCI is reactive with E. Coli, a vegetative bacterium found in drinking water sources. The main channel is a half full pipe with a diameter of 2 meters. For the reactor system below: Calculate the concentration of HOCI at the beginning of the reactor assuming the two flows are instantaneously mixed. Calculate the tau of the reactor if the desired disinfection efficacy is 99%. Calculate the volume of and length of the reactor.