How do you solve long hand?

The per capita energy consumption level (in kilowatt-hours) in a certain country for a recent year can be approximated by a normal distribution, as shown in the figure. (a) What consumption level represents the 4th percentile? (b) What consumption level represents the 23rd percentile? (c) What consumption level represents the third quartile? H = 2333 KWh = 570.1 KWh X 333 2333 4333 Kilowatt-hours (a) The consumption level that represents the 4th percentile is kilowatt-hours. Round to the nearest integer as needed.)