Hello. I asked help previously with this question and still needhelp. For part (d) solutions of 4.57 and 5.55 are both incorrect.Also, the other part (d) below should be (e) and I need help withthis question as well. This question is similar to Chapter 11,Problem 51 on page 301 of book "Fundamentals of Phyics" 8thedition, ISBN 978-0-470-04473-5.
