Below are the times (in days) it takes for a sample of 15 customers from Sarah's computer store to pay their invoices.
19, 15, 43, 39, 35, 31, 27, 22, 18, 34, 34, 34, 30, 30, 30

Draw the histogram for these data using an initial class boundary of 14.5, an ending class boundary of 50.5, and 4 classes of equal width. Label each class with its endpoints.