disp('Mastery-quiz for MAT 342, Linear algebra, Fall 1996')
disp('No calculator / computer technology allowed')
disp('Graded PASS - FAIL')
disp('If passed, student may use computers/calculators for ALL')
disp('further course-work. If failed, student must continue to')
disp('show all traditional hand-written work in ALL problems,')
disp('until student passes similar quiz. One attempt per week only.')
%
pause
A=[0 1 1 5 10;...
   5 1 5 17 50;...
   1000 0 1000 3000 9000;...
   -1 -1 0 -1 -8]
pause
%
rrefmovy(A)