Please help answer these two questions please

D Question 3 2 pts If you don't have any other information, your best prediction of Y would be for every value of X. Mean of X + Y O mean of X Mean of Y-squared O mean of Y D Question 4 2 pts The magnitude of the square of the Pearson r indicates the Degree to which the experimenter has utilized appropriate experimental design extent to which error occurred in the study degree to which X and Y are affected by a third variable , Z percentage of the variance in Y explained by the variance in X