A magazine is reporting on 11 fuel-efficient vehicles. Below are their fuel consumption rates (in mpg). Construct a frequency table for these values using 4 classes. 28.3 , 29.1 , 29.2 , 29.4 , 29.9 , 30.3 , 31.1 , 31.1 , 31.3 , 31.5 , 31.6