Consider the following statements regarding phase diagram rules for the crystal: 1. According to the Gibbs phase rule, the degree of freedom, (F) = Number of components (C) + Number of Phases (P) + 2. 2. The tie-line rule is applied to determine the compositions of two co-existing phases in a binary phase diagram. 3. In the lever rule, the tie-line at the temperature of interest is treated as a lever arm, with the fulcrum at the overall composition. Which of the above statements are correct?