Robert Plant scored a 600 on the SAT exam. What proportion of students in the United States who have taken the SAT exam have a score lower or equal to Robert Plant's score (Note: This is the same thing as asking what is the percentile rank of his score)? Note: Input answer to 4 decimal places.

Roger Daltrey scored a 400 on the SAT exam. What proportion of the students in the United States who have taken the SAT exam have a score that is between Roger Daltrey's score and Robert Plant's score? Note: Input answer to 4 decimal places.