5. Y is the present value random variable for a special 3-year temporary life annuity-due on (x). You are given:
a) $p_x = 0.9$, $t \ge 0$
b) $K_x$ is the curtate future lifetime random variable for (x)
c) $Y = 1.00$, $K_x = 0$
d) $Y = 1.87$, $K_x = 1$
e) $Y = 2.72$, $K_x = 2, 3, ...$
Calculate Var(Y)