Plz men ek Power point (2007 office) ki slide men ek chart banana chahta hon jis men x-axis per date or y-axis per time show ho. yani ke 28-02-2011 ko ek system 2 hrs 16 min down raha or yehi system 01-03-11 ko 2 hrs 18 min down raha , to is chez ko curve ki soorat men show karna chahta hon. plz yrgent help. Thanks