Plot a graph under Test Lab

Hello There,

I need to plot a graph for:

1. How many test cases were written?
2. How many test cases passed?
3. How many failed?
4. Each day, how many test cases were executed?

i have been asked to create a simple report in Quality Center with Excel Report Generator under Test lab to come up with a result for the questions listed above.

Can someone please help me out with this? I am completely new to HP Quality Center

Thanks