What is the first step to solving the division problem below?

6288 divided by 8

Aswimming pool has an input pump for filling the pool and an output pump for emptying the pool. the input pump can fill the pool in 3 hours, and the output pump can drain the pool in 5 hours. as you go to bed, the pool is full, but a neighbor’s kid turns on the output pump. at midnight, you awake to find the pool half empty. immediately, you turn on the input pump, but you are sleepy and forget to turn off the output pump. at what time will the pool become full?

What can you determine about the solutions of this system

Lydia collected two sets of data one set of data shows an outlier. which set has an outlier, and which number is the outlier?