For each question, please include a normal distribution curve that is labeled in full.

6. The lifetimes of a certain brand of photographic light are normally distributed with a mean of 210 h and a standard deviation of 50 h. a) What is the probability that a particular light will last more than 250 h? b) What percent of lights will need to be replaced within 235 h? c) Out of 2000 lights, how many will have a lifetime between 200 h and 400 h