A wind turbine in a wind farm is being shut down for maintenance, It takes 40 s for the turbine to go from its operating angular velocity to a complete stop, in which the angular velocity function 1s c(*) = [(ts-1 -40.0)12/100.0]rad's. IF the turbine is rotating counterclockwise looking into the page, what is the instantaneous angular acceleration at 1 = 25.00 s