% 
% Written by:
% -- 
% John L. Weatherwax                2007-09-10
% 
% email: wax@alum.mit.edu
% 
% Please send comments and especially bug reports to the
% above email address.
% 
%-----

delta = 0.2; 
gamma = 0.9; 

% Part (a): 
(1-delta)^3 

% Part (b): 
(1-delta)^3 + delta*gamma*(1-delta) + delta*(1-gamma)*gamma + (1-delta)*delta*gamma