A 50 kg ice-skater is moving toward the east across a frictionless frozen lake with a constant velocity when the constant force from a sudden wind pushes on the skater toward the west. A plot of positionx versus timet for the skater's motion is shown in the figure, wheret = 0 is taken to be the instant the wind starts to blow and the positive direction of thex axis is toward the east.(a)What is the kinetic energy of the ice-skater att = 0?(b) How much work does the force of the wind do on the ice-skater betweent = 0 andt = 3.0 s?