question	A		B		C		D		E
question	No.	P.c.	No.	P.c.	No.	P.c.	No.	P.c.	No.	P.c.
12	1	6.67	4	26.67	9	60	1	6.67	0	0
13	1	6.67	5	33.33	5	33.33	2	13.33	2	13.33
14	1	6.67	2	13.33	5	33.33	6	40	1	6.67
15	1	6.67	6	40	5	33.33	2	13.33	1	6.67
16	0	0	3	20	3	20	5	33.33	4	26.67