A tank, containing 500 liters of liquid, has a brine solution entering at a constant rate of 4 liters per minute. The well-stirred solution leaves the tank at the same rate. The concentration within the tank is monitored and found to be e 500 c(t) = kg/L. 50 a. Determine the amount of salt initially present within the tank. Initial amount of salt kg b. Determine the inflow concentration Cin(t), where Cin (t) denotes the concentration of salt in the brine solution flowing into the tank. Cin(t) = = kg/L