The James River flows in from the East at 50 m^3/s and joins the Jackson River flowing at 500 ft^3/min just outside Charlotte, NC. The turbidity in the James River is 6.8 NTU. If the turbidity in the Jackson River is 2.4 NTU, then what is the turbidity downstream from Charlotte, NC after the Jackson River joins the James River? Assume steady state conditions, no reactions occuring, and no other sources or sinks for turbidity.