The error term for Simpson's Rule is . Your task is to find where this expression MUSt be less than 0.00001.
It's a little tricky, right here. This requires some judgment. Where on your interval is the fourth derivative GREATEST? If we find where it is greatest, we can guarantee the error will be as desired. Find the value of 'c' that maximizes the fourth derivative. Evaluate that derivative. Substitute in the inequality and finish solving for 'h'. This can be translated into the appropriate value of 'n' that is required.
Let's see what you get.