Can anyone help me to create the curve on surfboard

Can anyone help me to create the curve on surfboard ..image and file attached file https://drive.google.com/file/d/0B49dYa5XQfP0QXAtM3dxRTJJN2c/view?usp=sharing
image https://drive.google.com/file/d/0B49dYa5XQfP0VG5fNjVvZGF1R3M/view?usp=sharing Thanks in advance ..
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