Open Question: I want to understand how to do this, at least a little help?

Freezing point of water (0 ℃), the boiling point (100 ℃), it will change, such as salt (sodium chloride) is added to it. This change can be calculated: 1) The freezing point depression ↓ ΔTf = m x (1.86) b) The boiling point elevation MX ↑ ΔTb = (0.51), where m = mol (NaCl) / kg (water) 1.2 〇 〇 grams of sodium chloride (salt) water 500 grams. 2.2 ○ ○ grams water 1000 grams of sodium chloride.