Intersection of the two curves: Solve .

Draw a sketch of each curve for the cases p > 0 and p < 0 and shade the required area. By symmetry the required area is the same for both cases so you only have to find it for one of these cases.

Note that .

Now set up the required integral and solve it.

If you're still struggling, start by giving p a concrete value like p = 1 to get the feel of things.