A toboggan and rider of total mass 90 kg travel down along the (smooth) slope defined by...

A toboggan and rider of total mass 90 kg travel down along the (smooth) slope defined by the equation y = 0.08x². At the instant x = 10 m, the toboggan's speed is 5 m/s. At this point, determine the rate of increase in speed and the normal force which the slope exerts on the toboggan. Neglect the size of the toboggan and rider for the calculation.