Assume the per capita (or per person) consumption of coffee in Los Angeles has a normal distribution with a mean of 18 pounds and a standard deviation of 5 pounds.

1. Determine the probability a person in Los Angeles consumes more than 10 pounds of coffee.
2. Determine the probability a person in Los Angeles consumes between 10 and 15 pounds of coffee.
3. 99% of all residents in Los Angeles consume at least how many pounds of coffee?

Please provide the numerical answer and the typed out formula for excel.