Swimmers on a 4x100 relay team each swim 100 meters, and their individual times are totaled to form their overall team time. A team records how long it takes each swimmer to complete their portion of the race each time they swim 100 meters in practice and competitions. Individual swimmers' times are independent from each other and normally distributed. The team will qualify for the state finals if they swim 240 seconds or less. Find the probability they will qualify for the state finals

options:
0.9131
0.7611
0.0869
0.2389
0.1587
0.5000
0.8413