Need help 1-3

1. The mass of the container holding this table is 3G. What is the mass of the table salt?

2. What is the mass if the combined mass of the table salt and the container is 124g and the mass of the container is 9g?

3. A gram is equal to 1,000 milligrams. If a sample has a mass of 52 grams, what is its mass in milligrams?