Emma has a new fitness tracker but has not learned all the functions yet, so can only read the cumulative distance and average pace of all of her runs since she started using it. On her first run using it she covered 8 km at an average pace of 6 minutes per km. She can work out from this that the run took her 8 × 6 = 48 minutes. After the second run, her cumulative distance was 14 km and overall average pace 5.5 minutes per km. Give your answer to one decimal place. What was her average pace on the second run?