Everyone has abs. If you want them to be visible you must remove the fat overlying them. This is done via having low body fat, which cannot be lost only in specific parts. Doing exercise for abs is misinformed and unrealistic marketing garbage.
A 4 week plan would include fasting, carb cycling, and lots of LSHAW
"They now look to a single and splendid government of an aristocracy, founded on banking institutions, and moneyed incorporations under the guise and cloak of their favored branches of manufactures, commerce and navigation, riding and ruling over the plundered ploughman and beggared yeomanry." - Thomas Jefferson, 1826