(a) We can't use the histogram in this case because we cannot define the class intervals for this data.
(b) We can use histogram here because it will be easy to divide the data into class intervals.
(c) We do not have approximate data we won't use a histogram. We do not know about the number of cassettes produced by companies.
(d) We can use the histogram in this case on we can divide the given data into class intervals.