Max 50X + 40Y Subject to: X + Y >= 5 X-3Y <= 0 10X +15Y <= 150 20X + 10Y <= 160 30X + 10Y >= 135 X, Y >= 0 Answer the following Questions: (Constraint #1) (Constraint #2) (Constraint #3) (Constraint #4) (Constraint # 5) a) Does an optimal solution exist? If so, what is the optimal solution? If not, why does not an optimal solution exist? Show your calculations and answers clearly. b) Does constraint #5 have slack or surplus? If so, which one and how much? c) Up to how much can the coefficient of Y in the objective function increase without changing the optimal solution? Show your calculations and answers clearly.

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Max 50X + 40Y
Subject to:
X + Y >= 5
X-3Y <= 0
10X +15Y <= 150
20X + 10Y <= 160
30X + 10Y >= 135
X, Y >= 0
Answer the following Questions:
(Constraint #1)
(Constraint #2)
(Constraint #3)
(Constraint #4)
(Constraint #5)
a) Does an optimal solution exist? If so, what is the optimal solution? If not, why does not an
optimal solution exist? Show your calculations and answers clearly.
b) Does constraint #5 have slack or surplus? If so, which one and how much?
c) Up to how much can the coefficient of Y in the objective function increase without changing
the optimal solution? Show your calculations and answers clearly.
d) If one increases the righthand side value of constraint #2 by 2, by how much does the value
of the objective function change, compared with that at the original optimal solution? Show
your calculations and answers clearly.
e) Up to how much can the righthand side value of constraint #1 be increased without
changing the dual value (i.e., the shadow price) of constraint #1? Answers clearly and
describe reasons.
f) If one increases the righthand side value of constraint #3 by 1, by how much does the value
of the objective function change, compared with that at the original optimal solution? Show
your calculations and answers clearly.
Transcribed Image Text:Max 50X + 40Y Subject to: X + Y >= 5 X-3Y <= 0 10X +15Y <= 150 20X + 10Y <= 160 30X + 10Y >= 135 X, Y >= 0 Answer the following Questions: (Constraint #1) (Constraint #2) (Constraint #3) (Constraint #4) (Constraint #5) a) Does an optimal solution exist? If so, what is the optimal solution? If not, why does not an optimal solution exist? Show your calculations and answers clearly. b) Does constraint #5 have slack or surplus? If so, which one and how much? c) Up to how much can the coefficient of Y in the objective function increase without changing the optimal solution? Show your calculations and answers clearly. d) If one increases the righthand side value of constraint #2 by 2, by how much does the value of the objective function change, compared with that at the original optimal solution? Show your calculations and answers clearly. e) Up to how much can the righthand side value of constraint #1 be increased without changing the dual value (i.e., the shadow price) of constraint #1? Answers clearly and describe reasons. f) If one increases the righthand side value of constraint #3 by 1, by how much does the value of the objective function change, compared with that at the original optimal solution? Show your calculations and answers clearly.
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