function F = chap_6_prob_20_fn(gamma)
% 
% 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; 

F = 200/(delta+gamma) - 200*gamma/((delta+gamma)^2) - ...
    (10/((1-gamma)^2))*(delta/(delta+gamma)) + ...
    10*delta/( (1-gamma)*((delta+gamma)^2) );