and \(c\ =\ \frac{1}{\Gamma\left(\alpha+1\right)}\left[2^{\alpha}\left(1-e^{-\frac{d\alpha}{2}}\right)^{\alpha}+\alpha d_{\alpha}^{\alpha-1}e^{-d_{\alpha}}\right]\), where \(d_{\alpha}\) was to be chosen s.t. c is minimized. \(d_{\alpha}\) was approximated and was found to be