Please stop posting your homework problems to R-help! The posting guide quite explictly does not allow it.
M.Maechler, ETH Zurich ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
