Rotational Motion Part 2

A uniform disc of mass 0.5‌kg and radius r is projected with velocity 18m∕ s at t=0 s on a rough horizontal surface. It starts off with a purely sliding motion at t=0 s. After 2 s it acquires a purely rolling motion (see figure). The total kinetic energy of the disc after 2 s will be _______ J.
(given, coefficient of friction is 0.3 and g=10m∕ s2)