Consider the following frequency distribution:

Class Frequency

10 up to 20 31

20 up to 30 34

30 up to 40 44

40 up to 50 23

b.Construct the cumulative frequency distribution and the cumulative relative frequency distribution.(Round "Cumulative Relative Frequency" to 3 decimal places.)

Class Cumulative Frequency Cumulative Relative Frequency

10 up to 20

20 up to 30

30 up to 40

40 up to 50

c-1.What percent of the observations are at least 10 but less than 20?(Round your answer to 1 decimal place.)

c-2.What percent of the observations are less than 30?(Round your answer to 1 decimal place.)