Question: How do you solve system of differential equations and make plots

I am new to Maple and trying to use it for a school project. I actually have this section of code written in a textbook and I want to use Maple to solve and plot this predator prey model. Here is what I have, Im not sure why it won't work any help will be geatly apprciated.

> e1 := diff(e(t), t)-0.325e-1*e(t)+.8*e(t)*w(t);
> e2 := diff(w(t), t)+.6*w(t)-0.5e-1*e(t)*w(t);
> sys := {e1, e2};
> ic := {e(0) = 18.0, w(0) = 0.21e-1};
> ivp := `union`(sys, ic);
> H := dsolve*(ivp, {e(t), w(t)}, numeric);
> H;
           / // d      \                                
    dsolve |{ |--- e(t)| - 0.0325 e(t) + 0.8 e(t) w(t),
           \ \\ dt     /                                

      / d      \                                           
      |--- w(t)| + 0.6 w(t) - 0.05 e(t) w(t), e(0) = 18.0,
      \ dt     /                                           

                  \                        \
      w(0) = 0.021 }, {e(t), w(t)}, numeric|
                  /                        /
> e1;
            / d      \                              
            |--- e(t)| - 0.0325 e(t) + 0.8 e(t) w(t)
            \ dt     /                              
> e2;
             / d      \                            
             |--- w(t)| + 0.6 w(t) - 0.05 e(t) w(t)
             \ dt     /                            
> H(0);
Error, (in dsolve) expecting an ODE or a set or list of ODEs. Received 0
> H(2);
Error, (in dsolve) expecting an ODE or a set or list of ODEs. Received 2
> H;
           / // d      \                                
    dsolve |{ |--- e(t)| - 0.0325 e(t) + 0.8 e(t) w(t),
           \ \\ dt     /                                

      / d      \                                           
      |--- w(t)| + 0.6 w(t) - 0.05 e(t) w(t), e(0) = 18.0,
      \ dt     /                                           

                  \                        \
      w(0) = 0.021 }, {e(t), w(t)}, numeric|
                  /                        /
> H(1);
Error, (in dsolve) expecting an ODE or a set or list of ODEs. Received 1
>