Answer
See the picture.
Work Step by Step
Cumulative frequency for "4.0-5.9" is $1$
Cumulative frequency for "6.0-7.9" is $1+0=1$
Cumulative frequency for "8.0-9.9" is $1+0+5=6$
Cumulative frequency for "10.0-11.9" is $1+0+5+9=15$
Cumulative frequency for "12.0-13.9" is $1+0+5+9+6=21$
Cumulative frequency for "14.0-15.9" is $1+0+5+9+6+7=28$
Cumulative frequency for "16.0-17.9" is $1+0+5+9+6+7+5=33$
Cumulative frequency for "18.0-19.9" is $1+0+5+9+6+7+5+11=44$
Cumulative frequency for "20.0-21.9" is $1+0+5+9+6+7+5+11+5=49$
Cumulative frequency for "22.0-23.9" is $1+0+5+9+6+7+5+11+5+1=50$
Cumulative frequency for "24.0-25.9" is $1+0+5+9+6+7+5+11+5+1+1=51$
