Four students measure the length of a minute-long trial four times. they record their measurements as shown.

julian:
57.3 seconds, 58.8 seconds, 59.5 seconds, 62.1 seconds

mia:
58 seconds, 59 seconds, 60 seconds, 61 seconds

sonu:
50 seconds, 60 seconds, 60 seconds, 70 seconds

parul:
57.23 seconds, 59.32 seconds, 62.34 seconds, 63.91 seconds

whose measurements were the most precise?