answer: 16,13
32. Several workers load and unload a batch of goods, with each worker having the same loading and unloading speed. If these workers work simultaneously, it would take 10 hours to complete the loading and unloading. Now the loading and unloading method is changed, starting with one person working, and then adding one more person every hour, each person who joins the loading and unloading continues to work until the end, and the last person added works for a time that is $\frac{1}{4}$ of the first person's working time. The total time required to complete the loading and unloading after the change is $\qquad$ hours, and $\qquad$ workers participate in the loading and unloading.