In a maximization problem, the dual value of the constraint 4x+5ylt;=12 is 7 and the allowable increase of the RHS value is 10 and the objective...

In a maximization problem, the dual value of the constraint 4x+5y<=12 is 7 and the allowable increase of the RHS value is 10 and the objective function value at the optimal solution is z=120. If the RHS of the constraint is incresed to 15; that is, 4x+5y<=15, what would the objective function value z be?

z=141

z=127

z=134

cannot tell since the RHS is increased by more than the allowable increase