A student sits on a stool that is rotating $($without friction$)$ with an angular speed of $5\mathrm{.}60ra\frac{d}{s}$; his arms are outstretched and he holds a brick in each hand. The rotational inertia of the system consisting of the student, bricks, and stool about the central axis is $6\mathrm{.}79kg{m}^2.$ If by moving the bricks the student decreases the rotational inertia of the system to $2\mathrm{.}18kg*m,$ what is the resulting angular speod of the stool?