A 59 g particle is moving to the left at 21 m/s . How much net work must be done on the particle to cause it to move to the right at 49 m/s

Apackage is projected up a 15° incline at a with an initial velocity of 8 m/s. knowing that the coefficient of kinetic friction between the package and the incline is 0.12, determine (a) the maximum distance d that the package will move up the incline, (b) the velocity of the package as it returns to its original position.