An object moves along the \(x\)-axis subject to a net force. The graph shows the object's linear momentum \(p\) as a function of time \(t\), where the segment from \(t = 2.0\text{ s}\) to \(t = 5.0\text{ s}\) is linear and changes from \(p = 8.0\text{ kg}\cdot\text{m/s}\) to \(p = -4.0\text{ kg}\cdot\text{m/s}\). What is the net force exerted on the object at time \(t = 3.0\text{ s}\)?