1. Please explain the Empirical Rule. Why we cannot use Chebyshev's Theorem in Normal Distributions? What is the application of the Chebyshev's Theorem? 2. Please explain the differences between a Normal Distribution and Standard Normal Distribution? Provide some numerical examples to support your answers! 3. Please, explain the differences between unusual and usual cases in Statistics? Provide their correlation with the deviations in the Empirical Rule? 4. Explain the Z-score formula and how it connects with the Standard Normal Distributions