Question

As you hold a book at rest in your hand two forces are being exerted on the book

Answer 1

The first force is your hand holding the book up, and the other one is gravity pulling the book down. Hope i helped :D

Step-by-step explanation:

Answer 2

a. gravity & hand on book

b. yes - 3rd law

c. no, the are acting on the same object

Hope this helped!