Reading Assignment:
  Today (Friday) we finished discussing 10.5 concerning
        the Heat Equation.  We also began discussing the
        Wave Equation, 10.6.
  On Monday, the last day of class, we will finish the 
        discussion from 10.6.

Problems (due Monday, 3/9):
  Section 10.5 : 3 (but assume ends are insulated, 4 points), 
                 12a (4 points), 17, 18a (4 points)
  Section 10.6 : 1a (4 points), and Read 15,16