function [ a, b ] = p21_interval ( )

%*****************************************************************************80
%
%% p21_interval() returns a starting interval for optimization for test 21.
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    02 March 2026
%
%  Author:
%
%    John Burkardt
%
%  Output:
%
%    real A, B: the left and right endpoints of the interval.
%
  a =  0.9;
  b =  6.2;

  return
end

