4.
IF
H_LF
_F
5
_S
3,
TH_N
H_LF
_F
10
_S
6,
B_S_D
_N
PR_P_RT__N.
S_NC_
2/3
_F
1/2
_S
1/3
(2/3
X
1/2
=
1/3),
2/3
_F
6
_S
4.
AN_TH_R
_LT_RN_T_V_
_S
T_
R__ND
_P
TH_
_NSW_R
T_
TH_
N__R_ST
_NT_G_R.
1/2
X
5
=
2.5,
R__ND
_P
T_
3
1/3
X
10
=
3.3,
R__ND
_P
T_
4