Graphically solve the following linear programming (LP) problem:
MAXIMIZE $3X + $9Y
s.t. X + Y ≤ 10 ....(1)
Y ≥ 6 .............(2)
both X and Y ≥ 0
Which one of the following points is the optimal point?
Keep your own graph.
Select one:
a. point (0, 6)
b. point (10, 10)
c. point (10, 0)
d. point (4, 6)
e. point (0, 10)