Given below are two quantities named I and II. Based on the given information, you have to determine the relation between the two quantities. You should use the given data and your knowledge of Mathematics to choose among the possible answers.

A mixture is made up of spirit and water. 120 litres of mixtures contain 25% spirit and the remaining is water.

Quantity I: Find the amount of water should be added so that the mixture contains 80% of water.

Quantity II: Find the amount of spirit that should be added if the percentage of spirit increases to 40%.