A person rolls a basketball (I = 23mr2) down a slope; the slope is inclined at an angle = 15. The basketball rolls without slipping down the slope. At the same time, another person slides a piece of ice down the slope. There is friction between the ice and the slope - just not very much. What must the coefficient of kinetic friction k between the ice and the slope be such that the piece of ice and the basketball have the same speed when they reach the bottom