Discuss the effect that each of the following has on the confidence interval: point estimate, level of confidence, sample size.

I think I'm going in somewhat the right direction, but need some reassurance on it. My thoughts:

The point estimate is the center of the interval. I look at it the same way I would view the mean, it's "average". The level of confidence is a direct correlation of what the point estimate is. The sample size affects it because the larger the size the more lower the confidence interval may be.