Problem 3 There are two parts: (a) [EML.Chapter_2.pdf, page 32]: Do part 1 of Exercise 48. (b) [EML.Chapter_2.pdf, page 33]: Do part 3 of Exercise 48. In your solutions for Problem

4, Problem 5, and Problem 6 as LEAN_4 scripts, you may want to include the following imports from the LEAN_4 library (possibly not all of them, but you will have to experiment to find out if all are needed): import Mathlib.Data.Real. Basic import Mathlib. Tactic. Interval Cases import Library. Theory. Comparison import Library. Theory. Parity import Library. Theory. Prime import Library. Tactic. ModCases import Library. Tactic. Extra import Library. Tactic. Numbers import Library. Tactic. Addarith import Library. Tactic. Cancel import Library. Tactic. Use