A belt Which is carrying a package was at rest initially.the belt moves with a constant acceleration of 2m/s^2 for a two second.the belt then moves with a constant deceleration until comes to stop.the coefficient of static and kinetic friction between a package and the belt are 0.35 and 0.25 respectively .determine a) the deceleration of the belt and b) the displacement of the package relative to the belt when the belt comes to stop