Value poorX[] = { new Value(0), new Value(4) };
Value poorY[] = { new Value(1), new Value(0) };
MembershipFunction poor = new MembershipFunctionPieceWiseLinear(poorX, poorY);
MembershipFunction good = new MembershipFunctionTrapetzoidal(new Value(1), new Value(4), new Value(6), new Value(9));
Value exX[] = { new Value(6), new Value(9), new Value(10) };
Value exY[] = { new Value(0), new Value(1), new Value(1) };
MembershipFunction excellent = new MembershipFunctionPieceWiseLinear(exX, exY);