The frequency distribution below was obtained by monitoring the number of vacation days per year
taken by twenty-five employees. Construct a histogram for the data. 
Definitions:
Volume Variance
The difference between the expected (budgeted) volume of production or sales and the actual volume, affecting costs and revenues.
Predetermined Overhead Rate
A rate used to allocate manufacturing overhead costs to products, calculated before the period begins based on estimated costs and activity levels.
Predetermined Overhead Rate
A rate used to allocate manufacturing overhead to individual jobs or units based on a consistent formula.
Machine-Hour
A unit of measure representing the operation of a machine for one hour, often used in allocating manufacturing overhead costs.
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