A block hangs from the ceiling by a massless rope. A 3.0-kg block is
attached to the first block and hangs below it on arjother piece of massless rope. The tension in the top rope is 63.0 N. Find the tension in the bottom rope and the mass of the top block.

What is the tension in the bottom rope in Newtons?

What is the mass of the top block in kilograms?