Could you please answer and explain question no.4 with details explanation and calculations to the correct answer 23.9 .
Question 4River water of salinity 5 containing 1.9 mg/L of Br- discharges into an estuary which has a salinity of 36. If theNot answeredbromide concentration in the estuary is 63.8 mg/L, and assuming complete mixing and that bromide behavesMarked out ofconservatively, estimate the bromide concentration in the mixing zone where the salinity is 16. You can solve1.0this problem by either plotting a graph, or by calculation.P FlagquestionAnswer:XThe correct answer is: 23.9Question 5The Yarra River estuary is classified as:Not answeredMarked out ofSelect one:1.0a. a fiord estuaryP Flagquestionb. a drowned river valleyS