Fifty cities provided information on vacancy rates (in %) in local apartments in the following frequency distribution. a

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Fifty cities provided information on vacancy rates (in %) in
local apartments in the following frequency distribution.
a-1. Construct the frequency
distribution, the cumulative frequency distribution, and the
cumulative relative frequency distribution. (Round
"Cumulative Relative Frequency" answers to 2 decimal
places.)
a-2. How many of the
cities had a vacancy rate of more than 6% but no more than 9%?
a-3. How many of the
cities had a vacancy rate of 9% or less?
a-4. What proportion of the
cities had a vacancy rate of more than 9%? (Round your
answer to 2 decimal places.)