Q3 (a) Solve the following LP model GRAPHICALLY by drawing a specific objective function (Iso- cost line) and show the feasible area. Minimize Cost $28X + $24Y s.t. (1) 5X +4Y 2600 (2) X+Y 2 300 (3) X 2 80 (4) Y 2 100 X,Y20 (b) Find the optimal solution and calculate the optimal (minimum) value). SHOW YOUR WORK Q4. (Based on the information from Q3 solved above) (a) WRITE below the STANDARD FORM of Q1 (introduce 4 SLACK and/or SURPLUS variables appropriately) and explain briefly what you have done to write this in the Standard Form: (Write the complete Standard Form here) (b) Given the optimal solution of Q3, find the optimal values of S1, S2, S3, and S4 from the Standard Form (NO NEED TO DRAW SEPARATE GRAPH). SHOW YOUR CALCULATIONS Based on the values of 51, 52, 53, and 54, comment on which constraints are binding and which are not binding