Consider the following cumulative frequency distribution: Class 15 up to 25 25 up to 35 35 up to 45 45 up to 55 Cumulative Frequency 40 60 130 150 a. Construct the frequency distribution. Frequency Class 15 up to 25 25 up to 35 35 up to 45 45 up to 55 c. What percent of the observations are less than 45? (Round you Percent of observations %