Let N be the last digit of your student number. Let X and Y be two continuous random variables that have the correlation coefficient c-0.1(N+1). Which of the following statements are true? (Wrongly ticked answers will reduce your marks in this question) a. The sum of Var(X) and Var(Y) is equal to Var (X+Y). b. X and Y are positively correlated. c. The sum of E[X] and E[Y] is equal to E[X+Y). d. X and Y are negatively correlated. e. X and Y are statistically independent.