1

2
=

4
R

2
: 2
=

1
: 2
=

1
E

S

1

2
=

1

2
=

1

2
=

1

2
=

1

2
=

1

2
=

1

2
=

1

2
=

1

2
=

1

2
=

1

2
=

4
R

4
R

4
R

4
R

4
R

4
R

4
R

4
R

4
R

4
R

4
R

2
: 2
=

2
: 2
=

2
: 2
=

2
: 2
=

2
: 2
=

2
: 2
=

2
: 2
=

2
: 2
=

2
: 2
=

2
: 2
=

2
: 2
=

1
E

1
E

1
E

1
E

1
E

1
E

1
E

1
E

1
E

1
E

1
E

1
: 2
=

1
: 2
=

1
: 2
=

1
: 2
=

1
: 2
=

1
: 2
=

1
: 2
=

1
: 2
=

1
: 2
=

1
: 2
=

1
: 2
=

S

S

S

S

S

S

S

S

S

S

S

---