Exercise 7: Multivariable Linear Regression 2 Question 1. An article investigated the relationship between physical activity and fatigue severity among COVID-19 patients. They commented that gender moderates the relationship between fatigue severity and physical activity. Explain to a colleague in plain language what the sentence in bold means. Include in your explanation how it is possible to test if gender signicantly moderates the relationship between physical activity and fatigue severity, using a linear regression model that predicts fatigue severity from physical activity. 200 words max Question 2. Describe two approaches researchers use to choose which predictors to include in a multivariabie regression model. Include as one of the approaches the one considered the best method and discuss the limitations of the other method. 100 words max