The 4th kilometer is often viewed as the hardest .
That was the case for Ayana as her 5th , 4th and 3rd to last laps were all over 69 ( 69.04 , 69.31 , 69.17 ) .
The 4th kilometer is often viewed as the hardest and that was the case for Ayana as her 5th , 4th and 3rd to last laps were all over 69 ( 69.04 , 69.31 , 69.17 ) .