求运筹学一题目：写出下列问题的对偶问题

Answer 1

max z'=3y1-5y2+2y3
y1+2y3<=3;
-2y1+y2-3y3=2;
3y1+3y2-7y3=-3;
4y1+4y2-4y3>=4;
y1<=0,y2>=0,y3无约束

Answer 2

max z'=3y1-5y2+2y3
y1+y2+2y3<=3;
-2y1+3y2-3y3=2;
3y1+4y2-7y3=-3;
4y1-4y3>=4;
y1<=0,y2>=0,y3无约束