could you please help me to answer question no.9 with explanations and calculations to the correct answer 80.8?

Question SNot answeredThe discharge of a mountain stream was determined using dilution gauging . Table Salt was dissolved instream water in a 2 L billy , and the conductivity of this salty brew measured to be 37932 S am ? TheMarked out of7. 0conductivity of the stream water was 52 HS cm – 7 . The dissolved salt was then pumped into the stream at avery steady 0.3 L / minute , and the conductivity measured just downstream . The maximum conductivity*P Flagquestionreached was 170 HS cm-. Estimate the discharge of the stream , in L / minute*Answer:XThe correct answer is : 80. 8Question 70Observing a stream bed where the substrate is a mix of gravel , cobbles , rocks and coarse sand , what can youNot answeredconclude about the water velocity in the stream ?Marked out of1. 0Select one.P Flag2 . There is insufficient information to answer this question.question+ hajon hamm at lamat and am i’m`At amman time.int7