Please solve asap and if its a probability question please answer with e^ the number no matter how small it is

4. In the linear regression framework, the coefficient of determination R2 A is a random variable with zero mean and whose variance depends on the number of observations; B is a number between 0 and 1 which measures the total observed variability of the output variable Y explained by the linear regression with the independent variable C is a random variable with zero mean and whose variance DOES NOT depend on the number of observations; D is a number between -1 and 1 which measures the total observed variability of the output variable Y explained the linear regression with the independent variable