Which one of the following items is a correct statement? 1) Rainfall Intensity in 5-year storm frequency is more than the rainfall intensity in 25-year storm frequency within a specific area. 2) Rainfall Intensity in pre-development conditions is more than the rainfall intensity in post-development conditions within a specific area. 3) Rainfall Intensity in 5-year storm frequency is less than the rainfall intensity in 25-year storm frequency within a specific area. 4) Rainfall Intensity in pre-development conditions is less than the rainfall intensity in post-development conditions within a specific area.