How can I get the body pictured above?

 I joined a Biggest Loser challenge here at work and I'm sure I have not done well AT ALL!  I started off strong until we had a weigh-in and I discovered I had lost only 5 lbs after 6 weeks of being SUPER DEDICATED!  FIVE LBS!
Discouragement set in and the last two weeks I have done piss poor.  The challenge is ending soon so I want to finish strong.  What do I have to do to get the body pictured above?  I have to be dedicated, I have to be strong and I have to persevere.
Wish me luck as I try hard to get to the point where I can wear a two piece and work it!

Striving on,
~E