Okay the book says:
"Evaluate the objective function, and most importantly, check that the integer solutions lie in the feasible region,
*Then they check their integers with EVERY CONTRAINT* "
Isn't there a faster way to check? That would take long, to check 4 Co-ordinates (or 8 Values) against 4/5 Inequalities.
So so glad I made that mistake now. Phew! I won't make that mistake on Friday!!!