q-5-8-10-from-pp98-99-attached-is-the-book

I need the answers for Q 5, 8, 10 from pp98 -99. Attached is the book.

Thanks,

https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=7&cad=rja&uact=8&ved=0ahUKEwjpkKyLqM_JAhXDPiYKHS83DMQQFgg7MAY&url=https%3A%2F%2Ffaculty.psau.edu.sa%2Ffiledownload%2Fdoc-8-pdf-220d17b28d99d88de80afcdad211b06a-original.pdf&usg=AFQjCNG1f911ZHoPM1XYLLAygA119KI8KQ&sig2=QLEZwGJ-ooojOVRiR7kF1g