Consider the following cumulative frequency distribution:

Interval	Cumulative Frequency
15 < x 25	80
25 < x 35	95
35 < x 45	170
45 < x 55	250

a-1. Construct the frequency distribution and the cumulative relative frequency distribution. (Round "Cumulative Relative Frequency" to 3 decimal places.)

a-2. How many observations are more than 35 but no more than 45? b. What percent of the observations are 35 or less? (Round your answer to 1 decimal place.)