Wastewater can increase the organic loading $($BOD$5)$ of a stream when it is discharged,

leading to a depletion of dissolved oxygen, DO$,$ an essential nutrient for aquatic species. A

wastewater treatment plant is discharging treated wastewater into a stream at a rate of $0\mathrm{.}3$

m$3/$s$,$ where the stream has a flow rate of $1\mathrm{.}2$m$3/$s$.$ The treated water has an organic loading

rate of $30$ppm$-$BOD$5,$ while the stream has an organic loading rate of $2$ppm$-$BOD$5.$

Additionally, the treated water has a dissolved oxygen $($DO$,$ and essential nutrient$)$ level of

$2$ppm$,$ while the stream has a DO level of $9$ppm$.$ Find the organic loading and DO of the

stream after the wastewater has been discharged