In a study on marital satisfaction, a researcher asks a sample of men to estimate how many times per week they say "I love you" to their spouse. The relative frequency distribution is given below for these data. Construct an ogive for these data.

Intervals _____________________ Relative Frequency

1-2 .............................................20

3-4 .............................................13

5-6 .............................................17

7-8 .............................................22

9-10 ............................................18

11-12 ...........................................10