Alarge tank is filled to capacity with 300 gallons of pure water. brine containing 5 pounds of salt per gallon is pumped into the tank at a rate of 3 gal/min. the well-mixed solution is pumped out at the same rate. a. set up an initial value problem (differential equation and initial condition) to find (6pts) b. find the number of pounds of salt in the tank at time (6pts) c. how much salt will be in the tank in 10 minutes? (2pts)