Yum Install Perl Rrdtool Centos

How do I install RRDTool on Red Hat Enterprise Linux 5.x – 64 bit version? I am attempting to install rrdtool ver 1.4.8 in CentOS 7 64 bit. This is a fresh install of the OS and this is the first component I am attempting to install. # yum install cairo-devel libxml2-devel pango-devel pango libpng-devel freetype freetype-devel libart. The package is included in the CentOS extras repository, enabled by default. # yum install epel-release. Install packages. Then install the following packages. Perl httpd httpd-devel rrdtool-perl mod_fcgid rrdtool perl-CGI-SpeedyCGI fping perl-Sys-Syslog # yum install perl httpd httpd-devel mod_fcgid rrdtool perl-CGI-SpeedyCGI fping rrdtool.
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Centos Install Yum

Yum Install Perl Cpan
I'm getting perl(Unix::Syslog) as a dependent package when I installing certain application. Perl(Unix::Syslog) is needed by I tried installing it as yum install 'perl(Unix::Syslog)' but it give following result.