Let \( f:\mathbb{R}\to\mathbb{R} \) be a thrice differentiable function such that \( f(0)=0 \), \( f(1)=1 \), \( f(2)=-1 \), \( f(3)=2 \) and \( f(4)=-2 \). Then, the minimum number of zeros of \(( 3f' f''+ff''')(x) \) is ___________.
