1. The problem statement, all variables and given/known data Solve the following LP problem GRAPHICALLY Minimise -x1+x2 subject to constraints x1+x2 >=1, x1+2x2<=8, x1-x2<=5, x1>=0, x2>=0. a)by sketching the feasible set b)finding optimal solutions of this LP problem. What is the optimal value of the objective function? c) If the objective is changed to 'maximise -x1_x2' then how does the optimal solution change? 2. Relevant equations 3. The attempt at a solution Do I just draw lines for all the equations, then choose 'corner points' and see if they satisfy each equation then shade the right area?