Biconservative Hypersurfaces in Euclidean 5-Space

We prove that every biconservative hypersurface M in E5\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\mathbb {E}^5$$\end{document} with constant norm of second fundamental form has constant mean curvature.