answer with real numbers and steps

The 6.0 kg bar isreleased from rest at an angle of 8; = 25 The spring attached to the top of the bar was unstretched when the bar was vertical. i) Find the change of the bar's gravitational potential energy as it falls to 8, = 35 T ii) Find the change of the spring's potential energy as it falls to 0, = 35 V:p,z > vsp,l s iii) Write an equation relating the speed of the bar's center to its angular speed at 8, = 35. v(w) = iv) Find the angular speed of the bar when it reaches 0, = 35, )y =