A uniform disk with rotational inertia \(I = 2.0\text{ kg}\cdot\text{m}^2\) is free to rotate about a fixed frictionless axle through its center. At time \(t = 0\text{ s}\), the disk is rotating clockwise with an angular speed of \(5.0\text{ rad/s}\). A net torque \(\tau\) is exerted on the disk along the rotational axis as a function of time \(t\) as shown in the graph, where counterclockwise torque is defined as positive. What is the angular velocity of the disk at \(t = 6.0\text{ s}\)?