Minimal projections and largest simplices

It is proved that the minimal norm $\theta_n$ of a projection in linear interpolation on the $n$-dimensional cube $Q_n=[0,1]^n$ satisfies the condition $\theta_n=O(n^{1/2})$, $n\in\mathrm{N}$. With the previous results of the author it means that $\theta_n\approx n^{1/2}$. The upper estimates are provided by the projection with knots of interpolation in vertices of а largest simplex in $Q_n$.