its about reading from a datagridview and load it from charts..please help I'm almost done

Question

p· 
Save the information to a file


· 
Load the information from a
file


· 
Draw several graphs to
illustrate some statistics


Each month a new file must be created to
store the information of that month. The information must be stored in the
following format: Date, Activity, Total_Time

Note: Total_Time is the total time for that day only!


When loading data remember that only on
day's data can be displayed at a time. However data from multiple dates are
required for the statistics.


You will need to create a means for the
user to clear the grid.


The following statistical data needs to be
calculated and displayed in the indicated chart format:


· 
The amount hours spent on a all
activities on a specific day, as a pie chart


· 
The average amount of time
spent in a specific week on each activity, as a bar chart


The total time per week for each activity over a
4 week period, as a line (or XY scatter) chart