Thank you so much for this.  I've been working on Mathematica but can't seem to figure out how to do it.

Could you please explain to me how to find the critical points?  Can you post the code you used to arrive at the answer?

Thanks again

Thank you so much for this.  I've been working on Mathematica but can't seem to figure out how to do it.

Could you please explain to me how to find the critical points?  Can you post the code you used to arrive at the answer?

Thanks again