A LPP maxz=ax+by having bounded feasible region with vertices on (2,1),(3,2),(5,6) and (1,7). Then which of following are TRUE?
A. maxz occurs at (1,7) and (5,6) if b=4a
B. maxz occurs at (1,7) and (5,6) if b=−4a
C. maxz does not exist
D. if maxz occurs at (1,7) and (5,6), then maxz occurs for infinite number of value of x and y
Choose the correct answer from the options given below: