plz solve the problems


  1. Page 391, use pencil and paper calculations to solve exercise #60. Show all the steps to convince your reader that you understand the process.  
  2. Page 391, use pencil and paper calculations to do part (a) and (b) in exercise #58. For part (c), use Matlab to plot the eventual salt content in each tank over the interval [0,400], then answer the questions in part (c) using both a physical and mathematical reason for your answer. For your mathematical answer, what is the limit of your solutions in part (b) as t goes to infinity.