Look at exam1ins.pdf in the lessons folder,

Do not rename files q1.m, q2.m, q3.m!

VARIABLE NAMES MUST BE 100% ACCURATE OR CREDIT IS 50% REDUCED.

STICK TO YOUR GUNS
Do not "try things"
Print out things.

1) Solving equations by zero (root) finding
      ROOT=fzero(FUNCTION,STARTPOINT)
      ROOT=fzero(FUNCTION,INTERVAL)
   where FUNCTION may be
      'SINGLEINPUTARGUMENTFUNCTION'
   or
      @(ARGUMENT) MULTIARGUMENTFUNCTION

   Also printing neatly
      fprintf(FORMATSTRING,VALUE1,VALUE2,...)
   WITH ABSOLUTELY NO DATA NUMBERS IN FORMATSTRING.
   Use %...i, %...f,%...E as appropriate.

   Also plotting curves
      plot(XVALUES,YVALUES[,FORMAT],...)
      axis, grid, title, xlabel, ylabel, legend, etc
      set gca xaxislocation, xticks, etc

   Also basic Matlab operations.

2) Interpolating/curve fitting
      YDESIRED=interp1(XMEASURED,YMEASURED,XDESIRED)
      YDESIRED=spline(XMEASURED,YMEASURED,XDESIRED)
      COEFFIT=polyfit(XMEASURED,YMEASURED,N)
      YDESIRED=polyval(COEFFIT,XDESIRED)

   Also
      integral(@(VARIABLE) MULTIARGUMENTFUNCTION,START,END)
      derCOEFFIT=polyder(COEFFIT)
      derYDESIRED=polyval(derCOEFFIT,XDESIRED)

   Also fprintf, plot, ...

   Also basic Matlab operations.

3) Solving ODE requires a function file
      function UNKNOWNSDERIVATIVES = ...
         FUNCTIONNAME(TVALUE,UNKNOWNS,...)
   Do not use any initial condition in this function!
   Next use ode45 as
      [TVALUES UNKNOWNSVALUES]=...
         ode45(FUNCTION,TRANGE,INITIALUNKNOWNS)
   where FUNCTION must be an anonymous function if FUNCTIONNAME has
   more input arguments than TVALUE and UNKNOWNS.  TRANGE must specify
   the desired range of TVALUE to find the UNKNOWNSVALUES in.
   INITIALUNKNOWNS must be the given values of the UNKNOWNSVALUES at
   the start of TRANGE.  You get the values of the computed first
   unknown out of UNKNOWNSVALUES using UNKNOWNSVALUES(:,1), etc.
   TVALUES are the corresponding values of the independent variable
   and includes at least the TRANGE values.

   Also fprintf, plot, ...

   Also basic Matlab operations.