The annual income distribution of a group of middle management employees at Compton Plastics approximates a normal distribution, with a mean of $ 47,200 and a standard deviation of $ 800.

1) Between which pair of values of annual income is approximately 68.26%?

2) Between which pair of values of annual income is approximately 95.44%?

3) What is annual income that is more than 80%?

4) What is annual income that is more than 30%?

5) What is annual income that is less than 20%?

6) What is annual income that is more than 50%?