Question 28 please

Problem 27 - 28: FN. A skater, initially at rest, pushes away from the side of a skating rink as shown in the sequence of figures below. While she touches the wall she exerts a constant force on it and as a result, the wall INITIAL it exerts a constant force Fy on her to the right. While she is in contact with the wall her center of mass moves a distance d. During this process, the skater's internal energy change is AE int Problem 27: [7 points] Which of the following equations represents the energy principle of the point particle system as applied to the skater from the initial to the final positions shown above? A) AKtrans + AEint = FNd FINAL B) AKtrans + AEint = -FNd C) AKtrans + AEint = 0 D) AKtrans = FNd E) None of the above Problem 28: [7 points] Which of the following equations represents the energy principle of the extended system as applied to the skater from the initial to the final positions shown above? A) AKtrans + AEint = FNd B) AKtrans + AEint = -FNd C) AKtrans + AEint = 0 D) AKtrans = FNd E) None of the above