How long will it take me to get a six pack (abs)?

I am 5"7, 120, BMI is 16. I run in the morning for 40 minutes, lift weights in the evening for 40-60 minutes. I don't have a six pack yet, how many weeks will it take me?
Answer:
From most diet and exercise plans, I heard it's about a 6 to 8 weeks.

Check out The Abs Diet by David Zinczencko of Men's Health or Bill Phillips Body for Life.

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