Suppose that a person is taking a walk along a long straight path and walks at a constant rate of 2.8 miles per hour. Below is a graph of the velocity function .

How far did the person travel in the first 3 hours?
Distance: miles

How is this distance related to the area of a certain region under the graph of ?

Find an algebraic formula for the position of the person at time , assuming that .

In order to get credit for this problem all answers must be correct.