QuestionSuppose X1,X2,X3,X4∼i.i.d. XX_1,X_2,X_3,X_4\sim \text{i.i.d. }X with E[X]=10E[X]=10 and Var(X)=4\operatorname{Var}(X)=4. Define S=2X1−2X2−X3+3X4S=2X_1-2X_2-X_3+3X_4. Choose the correct option(s) from below:
