Mr. Connor's business class has 106 students, classified by academic year and gender, as illustrated in the table. Mr. Connor randomly chooses one student to collect yesterday's work.

Academic Year Males Females
Freshmen 9 10
Sophomores 18 5
Juniors 12 16
Seniors 17 19
Step 1 of 2 : What is the probability that he selects a female, given that he chooses randomly from only the sophomores? Express your answer as a fraction or a decimal rounded to four decimal places.