= 126 C 5 2 3 4 4 c t t t2 c to t1 t d c c t t t c to b > I t t? 2 t I t t t t? 1 I ? | t5 | t | t | t | t | t | t | t c c c c c c c c > 5 c t t t1 c Ito t1 t t t? d t c c t t t c Ito t t t t c t t 2 I ? ? | t | t | t | t | t | t | t t t c c c c c c c rit. b 1 9 b d to t d to t b t I