Abox with a mass of 70 kg sits on a slope of 40 degrees. you are tasked with pushing the box up the slope. the static (stationary) coefficient of friction between the box and the slope is 0.55, and the kinematic (while moving) coefficient of friction is 0.35. a. what is the minimum force required to keep the box from slipping? b. what is the minimum force required to begin pushing the box up the slope? c. what is the minimum force required to maintain the box moving up the slope? d. what is the force required to accelerate the box up the slope at 0.65 m/s2 once it is already moving upwards? give your answers in newtons (n).