Use the Following Management Scientist Output to Answer the Questions $\mathrm { X } 1 + \mathrm { X } 2 + \mathrm { X } 3 < 85$

Use the following Management Scientist output to answer the questions.
MIN 4X1+5X2+6X3
S.T.
Objective Function Value = 400.000
1) $\mathrm { X } 1 + \mathrm { X } 2 + \mathrm { X } 3 < 85$
2) $3 \mathrm { X } 1 + 4 \mathrm { X } 2 + 2 \mathrm { X } 3 > 280$
3) $2 X 1 + 4 X 2 + 4 X 3 > 320$ $$\begin{array} { l c c } \text { Variable } & \text { Value } & \text { Reduced Cost } \\\mathrm { X } 1 & 0.000 & 1.500 \\\mathrm { X } 2 & 80.000 & 0.000 \\\mathrm { X } 3 & 0.000 & 1.000\end{array}$$ OBJECTIVE COEFFICIENT RANGES
$$\begin{array} { l c c } \text { Constraint } & \text { Slack/Surplus } & \text { Dual Price } \\1 & 5.000 & 0.000 \\2 & 40.000 & 0.000 \\3 & 0.000 & - 1.250\end{array}$$ RIGHT HAND SIDE RANGES
$$\begin{array} { l l l l } \text { Variable } & \text { Lower Limit } & \text { Current Value } & \text { Upper Limit } \\\text { X1 } & 2.500 & 4.000 & \text { No Upper Limit } \\\text { X2 } & 0.000 & 5.000 & 6.000 \\\text { X3 } & 5.000 & 6.000 & \text { No Upper Limit }\end{array}$$ $$\begin{array} { l l c l } \text { Constraint } & \text { Lower Limit } & \text { Current Value } & \text { Upper Limit } \\1 & 80.000 & 85.000 & \text { No Upper Limit } \\2 & \text { No Lower Limit } & 280.000 & 320.000 \\3 & 280.000 & 320.000 & 340.000\end{array}$$
a.What is the optimal solution,and what is the value of the profit contribution?
b.Which constraints are binding?
c.What are the dual prices for each resource? Interpret.
d.Compute and interpret the ranges of optimality.
e.Compute and interpret the ranges of feasibility.