4. (8 marks) SOLVER shows the constraints to a linear problem to be as follows: 2 2 8 8 Constraint1 Constraint2 1 3 4 8 SOLVER was used to solve the problem, yielding Variable Cells Cell Name Final Value 4 Reduced Cost 0 Objective Coefficient 4 Allowable Allowable Increase Decrease 1E+30 3 3 1E+30 $B$3 Dec Var $C$3 Dec Var X1 X2 0 -3 1 Constraints Cell Name Final Value 8 4 Shadow Price 2 0 Constraint R.H. Side 8 8 Allowable Increase 8 1E+30 Allowable Decrease 8 4 $D$5 $D$6 Constraint1 Constraint2 Suppose you are provided with the above partial output: a) What is the optimal solution and value? b) Which constraints are binding? c) What are the ranges of the cost coefficients and what is true in those ranges? d) What is the range of the RHSs? e) If the RHS of constraintl were 13, what would the optimal value be