to follow normal distribution with mean equal to 100 and standard deviation of 15 1) what is the proportion of people who have an IQ of less than 100?...

humans IQ are supposed to follow normal distribution with mean equal to 100 and standard deviation of 15 

1) what is the proportion of people who have an IQ of less than 100?

2) Woodrow megabrain has an IQ of 15. what is the (approximate) proportion of people who have an IQ higher than woodrow?

3) among 10,000 people how many people would you expect to have a lower IQ than Woodrow?

4) what percentage of people have an IQ between 85 and 95?

5) about 16% of people have IQs lower than willie notsosmart, what is willie's IQ?