Solve the all parts of following problem:
Problem: A 1.7kg book is lying on a 0.80m -high table. You pick it up and place it on a bookshelf 2.3m above the floor.
Part I: During this process, how much work does gravity do on the book?
Part II: During this process, how much work does your hand do on the book?
Rework your solution from the starting and check each step carefully.