Grajeda ran the start - off leg .
Grajeda recorded her individual - split time of 54.71 seconds , and the Mexican team went on to finish the second heat in seventh place , for a total time of 3 : 30.36 .
Running the start - off leg , Grajeda recorded her individual - split time of 54.71 seconds , and the Mexican team went on to finish the second heat in seventh place , for a total time of 3 : 30.36 .