E17. A 0.8-kg book rests on a table. A downward force of 12 N is exerted on the top of the book by a hand pushing down on the book

a What is the net force on the book? Is it accelerating? b. What is the magnitude of the gravitational force acting upon the book? c. What is the magnitude of the upward (normal) force exerted by the table on the book? (Is the book accelerated?)