We are pulmonologists ( doctors who treat lungs ) , examining lung function in adults with cystic fibrosis . We find the following values for FEV1 , a measure of airway obstruction ( already sorted ) 34 35 45 47 ( 45 + 47 ) / 2 = 46 48 51 59 median 55 60 66 70 Q3 ( 66 + 70 ) / 2 = 68 86 113 Fill in the following missing quantities using the data above . If an answer does not exist , write NA