Answer Exercise 4.5 (Questions: 4, 13, 25, 35, 39 correctly [please verify that

Answer Exercise 4.5 (Questions: 4, 13, 25, 35, 39 correctly [please verify that solutions are correct]
Also verify that Exercise 4.2 (Questions: 7, 15, 31, 35, 39)
Exercise 4.3 (Questions: 5, 13, 21, 25, 29)
Exercise 4.4 (Questions: 7, 15, 23, 29, 35) Are answered correctly, if not please help me make the corrections.
Please only type equations using Microsoft Word Equation Editor. Thank you!